CN1703879A - Low latency radio/baseband interface protocol - Google Patents

Abstract

A low latency radio/baseband interface protocol is provided. In one embodiment thereof, 8b/lOb encoding is used, which has distinct control characters and data characters. Control characters are used to define the beginning of a frame. More particularly, in accordance with one aspect of the invention, signaling between a baseband portion of a communications apparatus and a radio portion of the communications apparatus is achieved by encoding data units of a given number of bits into codes, each code being a data unit of a number of bits greater than the given number of bits. Multiple different types of data exchanges are defined, and a different code is assigned to each type of data exchange. For a given data exchange, a data exchange type is selected in accordance with data to be exchanged, and a message frame is formed in accordance with the data exchange type selected, the message including a code identifying the data exchange type. The message frame is then transmitted between the baseband portion and the radio portion.

Description

Radio/the baseband interface protocol of low latency

The present invention relates to communication protocol, especially in the base band of Wireless Telecom Equipment and the communication between RF (radio) parts.

The digital coding of known many types.A this date codes pattern that is called as 8b/10b is taken out the byte input and is produced DC equiulbrium flow with five maximum run length (1 and 0 the stream that promptly has equal number).Some single 10 code will have 1 and 0 of equal number, and some will have four 1 and six 0 or six 1 and four 0.In the later case, the inconsistency between 1 and 0 (disparity) is used as the input that produces to next 10 code, so that can reverse described inconsistency and maintenance overall balance stream.Based on this reason, some 8 inputs have two effective 10 codes, depend on the inconsistency of input.Eight input positions are divided into two groups, and one is that five hytes and one are three hytes.

Except that 256 data characters, described 8b/10b code has also defined 12 special control characters.256 data characters are called Dx.y, and special control character is called Kx.y.The x value is corresponding to five hytes, and the y value is corresponding to three hytes.

Special control character for example shows idle condition, test data or data delimiter.In the application of serial bit launching code character, because 10 codes of comma character (K28.5) are normally not present other place in coding stream, so described comma character is generally used for aiming at purpose.In particular, described comma character never appears in the connection of two 10 code characters.This attribute can be easy to detect the word boundary in bit stream.In addition, described comma character has 1 and 0 substring alternately, and this makes and is easy to phase-locked described incoming bit stream.(in fiber channel and gigabit Ethernet standard, all use described comma character.)

Also known to the base band of described Wireless Telecom Equipment and the various kinds of interfaces between the RF parts.In fact this interface is mainly being simulated in nature usually.In recent years, brought into use digital interface.

What want is should demonstrate low latency in described base band and RF interface between parts.For example, when setting up communication, transmission can comprise the known preamble part.During this preamble portion, the signal from radio unit is transmitted to described baseband part, wherein carry out AGC (automatic gain control) and determine that the digital value that consequently receives conforms to the known digital value of emission in described baseband part.Then corresponding AGC control data is sent back to described radio unit.Ding Yi control loop must have low latency so that make various other operations ask execution in the described preamble phase like this.Can quote other analogous cases, wherein require or want low latency.

In general, the present invention is used for the radio/baseband interface protocol of low latency.In an one embodiment, use the 8b/10b coding, have different control characters and data character.Control character is used for the beginning of definition frame.More specifically, according to one aspect of the invention, be implemented in the baseband portion of communication equipment and the signal transmission between the wireless part branch by the data cell of given number position being encoded to code, wherein each code is the data cell greater than the bits number of given number position.Defined the exchanges data of number of different types, and be that every kind of exchanges data is distributed different codes.For given exchanges data, to select the exchanges data type according to the data that will exchange, and form message frame according to selected exchanges data type, described message comprises the code of discerning described exchanges data type.Then, the described message frame of emission between described baseband portion and wireless part branch.

To be better understood the present invention with reference to following detailed description and accompanying drawing.In the accompanying drawings:

Fig. 1 is the block diagram of the operable communication system of the present invention.

Fig. 2 is the figure that illustrates first radio/baseband interface protocol.

Fig. 3 is the figure that illustrates second low latency radio/baseband interface protocol.

Fig. 4 is the figure of emission element of radio/baseband interface circuit of illustrated in greater detail Fig. 1.

Fig. 5 is the figure of receiving-member of radio/baseband interface circuit of illustrated in greater detail Fig. 1.

Referring now to Fig. 1, show the circuit diagram of communication system 100, in this communication system, can use the low latency radio/baseband interface that provides.Described communication system comprises the radio unit 110 with RF core 111 and first radio/baseband interface circuit 113, and the baseband part 120 with base band core 121 and second radio/baseband interface circuit 123.

RF core 111 is connected to antenna 130.Described base band core 121 comprises physical layer (PHY) piece 121a, media access control layer (MAC) piece 121b and controll block 121c, and described interconnects to adopt mode known in the state of the art to form integrated form base band core.

Two types signal-data and control signal, on the one hand, exchange between RF core 111 and first radio/baseband interface circuit 113, exchange between base band core 121 and second radio/baseband interface circuit 123 on the other hand.

First and second radio/baseband interface circuit 113 and 123 communicates with one another via digital radio/baseband interface 140.In exemplary embodiment, radio/baseband interface 140 is based on the low-power of serial ATA physical layer, discrepant, HSSI High-Speed Serial Interface substantially.Described interface 140 have two discrepant to 141 and 143, or four circuits.A pair of 141 have line driver and the receiver on the base band side at radio side; Another is to 143 line driver and the receivers on described radio side that have on described base band side.

In the exemplary embodiment, interface 140 uses the 8b/10b code via identical interface emission data and clock.

With reference to Fig. 4, at length show the emission element (" reflector ") of radio/baseband interface circuit of Fig. 1.The information that will be launched can be that sample information also can non-sample information (" control information ").Generate sample information by analog-digital converter (ADC) 403 in response to signal 401 from core 111 or 121.Buffered sample in buffer 405.On bus 407 from described core receiving control information and be applied to controll block 409.

Described controll block 409 is carried out the framing of described control information.Control information can be that (Addr Data) or other control information, sets as received signal intensity (RSSI), low noise amplifier/variable gain amplifier (LNA/VGA) etc. register access information.

These two all has the data output signal that is connected to multiplexer 411 buffer 405 and controll block 409.In addition, these two pieces all have the control signal of the control of being connected to/selection piece 413, and described control/selection piece 413 generates control signal CTRL and selects signal SEL signal.Described selection signal SEL determines that it still is that control frame is input to described 8b/10b transducer that adc data is input to 8b/10b transducer 415.Described control signal CTRL controls described 8b/10b transducer-particularly whether it produces 8b/10b control character or data character.If ADC buffer 405 is empty and do not have control information to be launched, so described control/selections piece 413 is selected the idle character that will launch from described 8b/10b transducer.

Serializer 417 serializations are from the data of described 8b/10b transducer 415, and line driver 419 is converted to electrical equivalent to this serial data.

If, common mode signalization 421 is set so if protocol requirement is provided with common-mode signal or is launching data.

With reference to Fig. 5, at length show the receiving-member (" receiver ") of radio/baseband interface circuit of Fig. 1.

The signal of telecommunication that line receiver unit 519 receives from described circuit recovers described clock and data clock signal is added to deserializer 517, and it carries out de-serialization to described data.

The data of institute's de-serialization are input in the 8b/10b decoder 515.Described decoder has three outputs: DATA output, CTRL ' output and 8b/10b rub-out signal output.The 8b/10b rub-out signal sends because the 8b/10b decoder error signal that error of transmission causes.CTRL ' signals and whether receives control character, and DATA is loaded with the value of the character that receives.Control frame detects piece 514 and detects whether received control frame.If, the crc error signal is set so because the transmission line mistake has received the control frame with crc error.If received control frame, CTRL ' signal is set so so that described control frame is routed to controll block 509 via demultiplexer 511.If do not receive control frame, so described data are written to buffer 505.Read described buffer data and be converted into analog signal 501 by DAC 503.

The control frame that decoding is received by controll block 509.According to described control frame, read/write register or control signal is set.

Note, in Figure 4 and 5, can slightly differently distribute by some functions of described expression, but in general realization, adopt one or another kind of mode that the function of all descriptions is provided.

Two transport layer alternatives have been stipulated.In the first transport layer alternative, it is the control bandwidth of the 320kbps of 100ns that the default configuration of digital radio/baseband interface 140 provides the sampled data bandwidth of 800Mbps and interface stand-by period.Sampled data speed can be that cost increases with the higher interface stand-by period.

In the second transport layer alternative, the default configuration of digital radio/baseband interface 140 provides the sampled data bandwidth of 800Mbps.Remaining 320Mbps bandwidth can be used for emission control and other information.Except that data sampling and control information, described interface can be launched the continuous data as RSSI value and so on.The interface stand-by period is 18.75ns in default configuration.

Described interface 140 is supported most transceiver architecture.Sampled data can come from low IF or I/Q transceiver.Described interface 140 is controlled radio via register access or via the parallel control field.

In the exemplary embodiment, radio/baseband interface 140 uses many registers to dispose and control described interface in described radio.In case this register is the RFBBIF control register, as in following table, describing:

Table 1:RFBBIF_CTRL-radio/baseband interface control register

The position	Symbol	Visit	Value	Describe
					15:4	Keep			Read and write is zero
3	??I_Q	??R/W [1]	??0×0 *??0×1	Multiplexed I/Q value (at first I) or the low IF I/Q of low IF sampling
					2	??LOOP	??R/W	??0×0 *??0×1	The loop back mode that is suitable for streamed data forbids allowing
1	??xMODE_UP	??R/W	??0×0 *??0×1	The frame type idle frame stream of launching in up link send frame
					0	??MODE_DOWN	??R/W	??0×0 *??0×1	The frame type idle frame stream of launching in down link send frame

[1] read-only for radio with I/Q or low IF output

Legend: * reset values; The undefined reset values of～*

Described interface 140 has one of four states: OFF, SLEEP, ACTIVE and CLOCK.Control current state via radio/base band status register RFBBIF_STATE:

Table 2:RFBBIF_STATE-radio/base band status register

The position	Symbol	Visit	Value	Describe
					15:2	Keep			Read and write is zero
1:0	STATE	R/W		The Interface status definition.When writing described interface, be converted to new state.Can not write this register from the transformation of SLEEP and CLOCK.

Legend: * reset values; The undefined reset values of～*

During the ACTIVE state, can two-way control communication and data flow give.

By being programmed for the SLEEP state, register RFBBIF_STATE enters the SLEEP state.After giving an order, described base band and radio unit 110 and 120 can cut off described interface 140.

In order to change the SLEEP state of jumping out, baseband part 120 is connected common-mode signal for up link.Described radio unit 110 is that described down link is connected common-mode signal and beginning initialization sequence.In case finish initialization sequence, described interface enters the ACTIVE state.

The CLOCK state is special off-position, and the down link that wherein has only interface keeps active so that provide timing base for baseband part 120.Up link has a power failure.Enter the CLOCK state by in described radio, register RFBBIF_STATE being programmed for the CLOCK state.After issue an order, PHY piece 121a and the radio unit 110 described up link of can cutting off the power supply.In case outage, described interface enters the CLOCK state.

Enter into the ACTIVE state in order to leave the CLOCK state, PHY piece 121a is applied to up link to common-mode signal.(for example, after delay 10ns), described baseband part 120 is to SYNC primitive of radio unit 110 emissions at a weak point.After launching described SYNC primitive, described radio/baseband interface 140 enters the ACTIVE state.

Described system does not power up, and described interface 140 is in the OFF state.After powering up described system, withdraw from the OFF state automatically.In order to withdraw from described OFF state after powering up, radio unit 110 is connected its reference oscillator (not shown).Can also optionally provide reference clock to baseband part 120.Radio unit 110 is carried out initialization sequence.After carrying out described initialization sequence, described interface is converted to the ACTIVE state.

Described interface 140 can come by the power supply that disconnects described system to enter the OFF state from all states.

In the exemplary embodiment, use 8b/10b to encode to be coded in the exchanges data between radio unit 110 and the baseband part 120, described 8b/10b coding is identical with appointment in ANSI X3.230-1994 (FC-PH) 11th item.The 8b/10b transmission code is encoded to 10 code words to eight bit byte.Select described code word like this, so that described code has enough zero-one transformation so that make the clock recovery in receiver be convenient to carry out.Described code is the DC balance; That is, in sufficiently long data flow, has one and zero of equal number.The inconsistency of described code operation never exceeds one.

Because not every ten code words all are effective code words, so transmission code is supported in the error detection in the described receiver.

At first launch data LSB.

Oscillator in radio unit 110 is a timing master system device in ACTIVE and CLOCK state.All relevant with system synchronization in described baseband part 120 clocks all are phase-locked to this oscillator.Can have at random 8b/10b code sequence by the down link that keeps interface activity and finish that this is phase-locked.

In the SLEEP state, can interrupt phase-locked in order to save power.Baseband part 120 can use different clocks or oscillator during the SLEEP state.Before entering the ACTIVE state, baseband part 120 is its clock of phase locking and radio once more.

Up link is phase-locked to the down link of radio/baseband interface 140.

Using before radio/baseband interface 140 launches data, with training sequence come initialization it in case in the down link of described interface 140 and up link the PLL (not shown) of phase-locked described interface.

Defining described initialization sequence is six repetitions (150us): K28.3, D21.4, D21.5, the D21.5 of following SYNC primitive.

After initialization, the 8b/10b receiver should be supposed positive or negative inconsistency.

Preferably, described initialization is from coming the described down link of initialization with described initialization sequence.After the initialization down link, via described initialization sequence initialization up link.

In order to understand the radio/baseband interface of low latency better, the interface alternative that is not low latency will be described at first.

Fig. 2 for example understands first alternative of radio/base band Frame Protocol.Two frame formats have been defined; One is used for up link, and one is used for down link.Each frame is with the SOF sign-on, and the back is sampled data field, one or more control fields of using more and some fields to register access in described radio unit 110 are provided together.Each frame finishes with crc field.

Provided the detailed description of described field below.

Determine described frame length by the stand-by period demand to the control signal of time strictness, the control signal of described time strictness must be passed through radio/baseband interface 140 (for example AGC control).

Owing to stand-by period of interface itself and realize serializer 417, deserializer 517,8b/10b encoder 415 and 515 and stand-by period of causing of other piece provided total stand-by period.The stand-by period of described interface will be only considered in following column count.

The following frame length of on average allowing that provided:

frame_length _enc＝f _clk×t?latency(max)

Following having provided for the interface stand-by period is that 100ns and frequency are the average frame length of 1.6GHz:

Frame_length _Enc=1.6 * 10 ⁹* 10O * 10 ^-9=160 bits.

Before the 8b/10b coding, provide following frame length:

Frame_length=160 * 8/10=128 bit=16 bytes.

Because Optional Field is so actual frame length can change.Different selection of configuration for the RF-BB frame of 10 sampled datas samplings have been shown in table 3 and table 4.

Table 3-radio/base band uplink frame

??SOF	?RAA	?RWn	The sampling field	The RA field	The RD field	Frame length
								Bits of coded	Data bit
						Stream send frame
?SOF1 ?SOF1 ?SOF1	?0 ?1 ?1	?X ?0 ?1	Be	Be not	Whether deny									????3×8＝104 ????16×8＝128 ????14×8＝112	????13×10＝130 ????16×10＝160 ????14×10＝140
						Idle frame
?SOF2 ?SOF2 ?SOF2	?0 ?1 ?1	?X ?0 ?1	Not	Be not	Whether deny									????3×8＝24 ????6×8＝48 ????4×8＝32	????3×10＝30 ????6×10＝60 ????4×10＝40

Table 4-radio/base band descending chain circuit frame

??SOF	??DR	The sampling field	The RD field			Frame length
								Bits of coded	Data bit
						Stream send frame
??SOF1 ??SOF1	??0 ??1	Be		Be not										??14×8＝112 ??16×8＝128	??14×10＝140 ??16×10＝160
						Idle frame
??SOF2 ??SOF2	??0 ??1	Not		Be not										??4×8＝32 ??6×8＝48	???4×10＝40 ???6×10＝60

Described frame length be such so that two frames on average equal frame_length byte or still less.If be launched without any sampled data, amount reduces described frame length considerably so.This frame length that reduces has following benefit: the stand-by period to idle frame can send the stand-by period weak point of frame to reach 80% than convection current, and the result produces the stand-by period of about 20ns.This low latency is very important in the loop of time strictness in for example as described AGC.

If will be launched into up link or down link without any frame, so described interface 140 inserts 8b/10b symbol at random between frame.

Frame beginsThe S0F Field Definition preamble that begins of frame.Use two different preambles to distinguish stream and send frame (SOF1) and idle frame (SOF2).

S0F1 is selected as 8b/10b control character K28.1, and SOF2 is control character K28.7.These two characters all are comma character so that make frame synchronization be convenient to carry out.

The sampled data fieldThe sampled data field is only sent in the frame available at stream.Described sampled data field comprises the data of coming the upstream or downstream link sampling of ADC and DAC (not shown) in the comfortable described radio unit 110.

Described sampled data field is only used with the SOF2 symbol.

Use radio/baseband interface data sampling format register to stipulate described data sampling form, as follows:

Table 5:RFBBIF_SMPL-radio/baseband interface data sampling format register

The position	Symbol	Visit	Value	Describe
					??15:8	??SAMPLES	??R/W [1]	??0×8 *	The data sampling of the data sampling of every frame or every SMPL field in alternative 1
??7.0	??WIDTH	??R/W [1]	??0×A *	Every data sampling position

[1] read-only for radio with anchor-frame form

Legend: * reset values; The undefined reset values of～*

Value dn_samples and up_samples have defined the number of sampled data sampling in described descending and up link respectively.Value dn_s_width and up_s_width have defined the number at each sampling meta of descending and up link respectively.Value dn_sample_bits and up_sample_bits have defined the number at the sampled data field meta of descending and up link respectively.Value dn_sample_bit _SencAnd up_sample_bits _EncDefined the number of 8b/10b bits of coded in the sampled data field of descending and up link respectively.

The number of the sampled data sampling of recommending be set to eight and selected like this thus its be equivalent to/from the sample rate of the 40M samples/sec of the I/Q sampling of 802.11g baseband processor or the sample rate of the 80M samples/sec that IF samples.This arrangement has reduced the quantity of the desired buffering of data sampling, and has minimized the interface stand-by period of data sampling.

Control fieldThe CTRL field is used for the control signal of time strictness, and as AGC, but it can also be used to signaling such incident, described incident not necessarily the time strictness but may occur simultaneously with other signal.Up link CTRL field is 6 bit wides, and down link CTRL field is 8 bit wides.

MON field in down link can be used for monitoring the value in the radio of picture RSSI and so on.

The radio manufacturer is depended in the use of CTRL and MON field.

Register dataThis wireless R/W register access is begun by uplink frame.RAA field (available register address) is set to one so that show one of baseband part 120 requirement visits register in radio unit 110.Present frame comprises the address of the register that needs are accessed.For read access, the RWn field is set to one; For write access, the RWn field is set to zero.

Writing under the affairs situation, uplink frame comprises need be written into the register data of radio register in the RD field.Reading under the affairs situation, one of next descending chain circuit frame fetches data register read in the RD field and turns back to baseband part.

If described RD field comprises effective register value, so DR field (data ready) is set to one.In other all situations, described DR field is set to zero.

Can not read any new register up in down link, having received previous reading by baseband part.RA in up link and descending chain circuit frame and RD field are optionally, and only just are required when needs read or be written in register in the radio.Determine the existence of RA and RD field by the value of RAA field and R/W field.

Cyclic redundancy check (CRC)8 crc fields are the last fields in described frame, and it comprises the CRC result calculated.Calculate the crc value in up link in the described frame data after the SOF field on all data.In down link, calculate CRC on all data in the described frame after described SOF field.During transmission, before the 8b/10b coding, calculate CRC; When receiving, after the 8b/10b decoding, calculate CRC.

In the exemplary embodiment, the CRC multinomial is g (x)=x8+x2+x+1.Begin to calculate CRC from all nought states.

The interface stand-by period of above-mentioned agreement alternative is 100ns in default configuration.

Fig. 3 for example understands the alternative embodiment of radio/base band Frame Protocol, and it has optimized low the stand-by period.Define several frames and stream and sent form.

Start the data flow of particular type or the transmission of frame type by the 8b/10b control word.Table 6 has been listed the control word of definition in the exemplary embodiment.

Table 6:SOF identifier

The SOF identifier	The 8b/10b control word	Describe
			?SOF01 ?SOF02 ?SOF03 ?SOF04 ?SOF05 ?SOF06 ?SOF07 ?SOF08-12	?K28.1 ?K28.0 ?K28.2 ?K28.3 ?K28.4 ?K28.6 ?K28.7 ?K28.5，K23.7，K27.7， ?K29.7，K30.7	The streamed data sampling; The 8b/10b comma character writes register read register/reading result and writes VGA/LNA/RSSI stream and write control/control Info idling cycle Resync, and comma character keeps

Data flow is sentSend with SOF01 control word log-on data stream.Sampled data is followed behind initial control word.Also insert the SOF01 control word so as to fit in sampled data and interface rate between data transfer rate.

During data flow is sent, just insert other control frame and replace SOF01 rate adapted symbol.In the control frame ending of inserting, the transmission of restore data sampling under the situation that does not require the SOF01 symbol that emission is other.

The data sampling fieldThe bit of the number of data sampling and each sampling can be programmed by register access in the SMPL field.If at the number of SMPL meta is not 8 multiple, fill the SMPL field with zero so.This layout makes the sampling field very flexible because it can be included in single sampling under the situation of low of radio, I/Q sampling to or a plurality of sampling.

Idle frameDo not launch idle frame so if there is data sampling to be launched.Described frame is with unique SOF06 sign-on, and the back is a random data.Approximately per 1000 data symbols insert the SOF07 symbol in case under the situation of error of transmission, make described interface be convenient to synchronously again carry out.In the identical mode of data sample streams is flowed control frame insertion idle frame.

Write registerCan at any time insert in data sampling stream or the idling cycle writing the register frame.Described frame begins with unique SOF02 control word, and the back is eight address bits and 16 data bit.For other error detection capability is provided, described frame finishes with 8 CRC.

Read registerCan at any time insert in data sampling stream or the idling cycle reading the register frame.Described frame begins with unique SOF03 control word, and the back is eight address bits.For other error detection capability is provided, described frame finishes with 8 CRC.When reading register frame arrival radio, described radio reads internal register.Described interface places the result frame that reads of downgoing line to register value, and at any time described frame is inserted in data sampling stream or the idling cycle.

Write VGA/LNACan at any time insert in data sampling stream or the idling cycle writing the VGA/LNA frame.Described frame begins with unique SOF04 control word, and the back is eight and is used for the position that VGA/LNA sets.

Write controlCan at any time insert in data sampling stream or the idling cycle writing control frame.Described frame begins with unique SOF05 control word, and the back is eight control bits.Described control bit can be used to enable the power amplifier (not shown), switched antenna or switch between Rx and Tx.

RSSI streamCan be at any time in the data sampling stream or idling cycle stream in the RSSI stream frame insertion downgoing line.Described frame begins with unique SOF04 control word, and the back is eight a RSSI value.The speed of RSSI stream frame is programmable.The user must guarantee that the combined data rate of data sampling stream and RSSI stream frame is no more than the bandwidth of described interface.

Control informationCan be at any time in the data sampling stream or idling cycle stream in the control information frame insertion downgoing line.Described frame begins with unique SOF05 control word, and the back is eight control bits.Described control bit can be used to show interruption or other incident that is produced by radio.Emission control frame when control signal changes.

CRC8 crc fields are the last fields in described register access frame, and comprise the CRC result calculated.Calculate the crc value in up link in the described frame after the SOF field on all data.In down link, calculate CRC on all data in the described frame after described SOF field.During transmission, before the 8b/10b coding, calculate CRC; When receiving, after the 8b/10b decoding, calculate CRC.In the exemplary embodiment, the CRC multinomial is g (x)=x8+x2+x+1.Begin to calculate CRC from all nought states.

Error of transmission is handledIn downgoing line, detect after crc error or the 8b/10b decoding error described base band transmitter register visit frame request radio transmission Resync frame (SOF07).

If detect crc error or 8b/10b decoding error in uplink, described radio is asked Resync frame (SOF07) to the base band frame that sends control information.

According to this alternative agreement, the interface stand-by period in default configuration is 18.75ns.This low latency is from having simplified the integrated of radio and baseband part in fact.

Such as description can carry out various modifications and improvement to basic interface.For example, can not only can also between single 8b/10b data word, insert control information between the data sampling field.In addition, if a control frame has higher priority than another control frame, can insert it in other control frame.For error detection and fault processing, can protect frame with the CRC code selectively according to the importance of information.If error of transmission, the control information that can carry out between described baseband portion and described wireless part branch exchanges so that the notice opposite side: the data that received are destroyed.According to further revising, if the continuous free codes of some, so described interface can automatically enter park mode.Except that radio/baseband interface, also can use same or similar interface in other place, for example between physical layer part and medium access control part, also can use.

Because described the present invention like this with respect to specific embodiment, those skilled in the art should be appreciated that under the situation that does not break away from spirit of the present invention or substantive characteristics can specialize the present invention with other specific forms.Therefore should be considered as disclosure embodiment illustrative and not restrictive in all fields.Show scope of the present invention by accessory claim, rather than above-mentioned specification, and be intended in described meaning and scope and all changes in the equivalent scope be included in wherein.

Claims (25)

1. method of between the second portion of the first of communication equipment and described communication equipment, carrying out the signal transmission, comprise: the data cell of coding given number position is so that form code, and each code is the data cell greater than the bits number of given number position; The information exchange of definition number of different types and be the different code of every kind of information exchange distribution; And for given information exchange: form message frame according to selected information exchange type, described message comprises the code that is used to discern described information exchange type; And between baseband portion and wireless part branch, launch described message frame.

2. the method for claim 1, the first of wherein said communication equipment is a baseband portion, the second portion of described communication equipment is the radio part.

3. the method for claim 1, the first of wherein said communication equipment is a physical layer part, the second portion of described communication equipment is the medium access control part.

4. the method for claim 1 wherein exchanges sampled data and control information between described radio part and described baseband portion, uses the different kinds of information of definition to exchange described sampled data and control information.

5. method as claimed in claim 4, wherein data flow is delivered to change and is comprised: in rapid succession from one of described radio part and described baseband portion to described radio partly and another of described baseband portion send a plurality of data sampling fields.

6. method as claimed in claim 4, wherein the data bit number of the number of data samples in the data sampling field and each data sampling is programmable one of at least.

7. method as claimed in claim 4, wherein the data bit number of the number of data samples in the data sampling field and each data sampling all is programmable.

8. method as claimed in claim 5 is wherein delivered the code that changes and is inserted between the selected data sampling field so that realize desirable total data transfer rate distributing to data flow.

9. method as claimed in claim 8 wherein is inserted in the control information exchange that comprises respective code between the selected data sampling field so that realize desirable total data transfer rate.

10. method as claimed in claim 4 has wherein defined the control information exchange of number of different types.

11. the method for claim 1, wherein said code communicating data or control information and timing information the two.

12. method as claimed in claim 11, wherein said code are the 8b/10b codes.

13. method as claimed in claim 12 wherein is inserted in the control information exchange that comprises respective code between the selected 8b/10b data word so that realize desirable total data transfer rate.

14. method as claimed in claim 11, wherein defined following one of at least: the resync code that shows the free codes of idle condition and have one and zero special difference pattern.

15. method as claimed in claim 11, wherein defined following both: the resync code that shows the free codes of idle condition and have one and zero special difference pattern.

16. method as claimed in claim 15 is wherein launched idle stream, comprises a plurality of free codes continuously occurring.

17. method as claimed in claim 16 wherein when transmission or when receiving the continuous free codes pre-determine number, automatically enters park mode.

18. method as claimed in claim 16 wherein is inserted in the control information exchange that comprises respective code between the selected free codes.

19. the method for claim 1, the importance that includes selectively according to message frame is added to CRC information on the described message frame.

20. the method for claim 1 comprises: the detected transmission mistake; With in response to described error of transmission, start the control information exchange of the described error of transmission of report.

21. the method for claim 1 comprises: start first control information exchange; And before described first control information exchange finishes, start second control information exchange of higher priority.

22. circuit that is used for radio communication, have and be used for the interface circuit that is connected with another circuit interface that also is used for radio communication, described interface circuit comprises: coding circuit, be used to encode the data cell of given number position so that form code, each code is the data cell greater than the bits number of given number position; Control circuit is used to define the information exchange of number of different types and is every kind of different code of information exchange distribution; Framer circuit is used for forming message frame according to selected information exchange type, and described message comprises the code that is used to discern described information exchange type; And radiating circuit, be used for the described message frame of emission between a circuit and another circuit.

23. interface circuit as claimed in claim 22, the baseband portion that a wherein said circuit and described another circuit are communication equipments and the radio part of described communication equipment.

24. circuit that is used for radio communication, have and be used for the interface circuit that is connected with another circuit interface that also is used for radio communication, described interface circuit comprises: receiving circuit, be used to be received in the message frame that transmits between a circuit and another circuit, described message frame comprises the code that is used for the identifying information switch type; Decoding circuit, the code that is used to decode is so that obtain the data cell of given number position, and each code is the data cell greater than the bits number of given number position; The frame circuit is conciliate in control, is used for detecting according to the different code of distributing to the information exchange of type separately the information exchange of number of different types, and is used for according to the information exchange type that is detected from described message frame information extraction.

25. interface circuit as claimed in claim 24, the baseband portion that a wherein said circuit and described another circuit are communication equipments and the radio part of described communication equipment.

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