CN104052642B - A kind of communication system and communication means - Google Patents
A kind of communication system and communication means Download PDFInfo
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- CN104052642B CN104052642B CN201410259102.5A CN201410259102A CN104052642B CN 104052642 B CN104052642 B CN 104052642B CN 201410259102 A CN201410259102 A CN 201410259102A CN 104052642 B CN104052642 B CN 104052642B
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Abstract
The invention discloses a kind of communication system and communication means, communication system includes：First process plate, second processing plate and the first Retimer chips, wherein：First Retimer chips are connected with the controller of the first process plate, and the first process plate is connected with second processing plate by system for serial small computer interface SAS cables；First process plate is used to send link negotiation signal under optical mode, and the first Retimer chips are used to be modified link negotiation signal, and give revised link negotiation signal to second processing plate by SAS cable transmissions；Second processing plate is used under optical mode return to link response signal to the first process plate according to revised link negotiation signal.System and method provided by the invention are to solve in the prior art, with the increase of the lifting of the signal transmission rate of SAS link, or linkage length, the larger technical problem of decay of the signal in transmitting procedure.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of communication system and communication means.
Background technology
System for serial small computer interface (Serial Attached Small Computer System
Interface, SAS) link is mainly used in data transfer between memory.
At present, as the update of product, the transmission technology of SAS link come into the third generation, corresponding SAS transmission
Agreement is also upgraded to SAS3.0 agreements, and the signal transmission rate in SAS3.0 agreements is promoted to 12G by 6G, simultaneously as increase
Requirement to optical cable access, the requirement in SAS3.0 agreements to the adjustable attenuation of signal are also tightened up.
However, during SAS link transmission signal, with the lifting of signal transmission rate, or the increase with linkage length, letter
Number decay be consequently increased.
The content of the invention
The present invention provides a kind of communication system and communication means, to solve in the prior art, with the signal of SAS link
The lifting of transmission rate, or the increase of linkage length, the larger technical problem of decay of the signal in transmitting procedure.
In a first aspect, the invention provides a kind of communication system, including the first process plate, second processing plate and first
Retimer chips, wherein：The first Retimer chips and the controller of first process plate are attached by circuit,
First process plate is attached with the second processing plate by system for serial small computer interface SAS cables, described
First Retimer chips are the high speed signal driving element with clock and data recovery function；First process plate, is used for
When detect be connected with the SAS cables in first process plate when, transmission link negotiation signal, wherein, at described first
The mode of operation for managing plate is optical mode, and the link negotiation signal is the signal that first process plate is sent under optical mode；
The first Retimer chips, the link negotiation signal is repaiied for the information in the link negotiation signal
Just, and by revised link negotiation signal by the SAS cable transmissions second processing plate is given；The second processing
Plate, rung for returning to link to first process plate according to the revised link negotiation signal of the first Retimer chips
Induction signal, communicated to connect with being established with first process plate, wherein, the mode of operation of the second processing plate is optical mode.
With reference in a first aspect, in the first possible implementation, the first Retimer chips, specifically for root
According to the information in the link negotiation signal, the link negotiation signal is modified according to default transmission rate, and will
Revised link negotiation signal is transferred to the second processing plate by the SAS cables according to default transmission rate, its
In, the default transmission rate is the maximum biography that the communication link between first process plate and the second processing plate is supported
Defeated speed.
It is described logical in second of possible implementation with reference to first aspect or the first possible implementation
Letter system also includes：2nd Retimer chips, the controller of the 2nd Retimer chips and the second processing plate pass through
Circuit is attached, and the revised link negotiation signal for being sent to the first Retimer chips is carried out again
Correct, and revised link negotiation signal again is transferred to the controller of second control panel；The second processing plate,
Specifically for returning to the chain to first process plate according to the revised link negotiation signal of the 2nd Retimer chips
Road response signal, communicated to connect with being established with first process plate, wherein, the mode of operation of the second processing plate is optical mode
Formula.
With reference to any one in first aspect or the first possible implementation to second of possible implementation
Kind, in the third possible implementation, the SAS cables include SAS cable or SAS optical cables, wherein：If the SAS lines
Cable is SAS cable, then the length of the SAS cable is not less than 0.5 meter；If or the SAS cables are SAS optical cables, the SAS
The length of optical cable is not less than 10 meters.
Second aspect, the invention provides a kind of communication means, applied in communication system, the communication system includes the
One process plate, second processing plate and the first Retimer chips, wherein, first process plate is led to the second processing plate
Cross system for serial small computer interface SAS cables to be attached, the first controller of first process plate and described first
Retimer chips are attached by circuit, and the first Retimer chips are the high speed with clock and data recovery function
Signal driver part, methods described include：The first process plate transmission link negotiation signal；Wherein, first process plate
Mode of operation be optical mode, the link negotiation signal is the signal that first process plate is sent under optical mode；It is described
First Retimer chips receive the link negotiation signal；The first Retimer chips are according in the link negotiation signal
Information the link negotiation signal is modified；The first Retimer chips lead to revised link negotiation signal
The SAS cable transmissions are crossed to the second processing plate；After the second processing plate is according to the first Retimer chip amendments
Link negotiation signal to first process plate return link response signal, to establish communication link with first process plate
Connect, wherein, the mode of operation of the second processing plate is optical mode.
With reference to second aspect, in the first possible implementation, the first Retimer chips are according to the link
Information in negotiation signal the link negotiation signal is modified including：The first Retimer chips are according to the chain
Information in the negotiation signal of road, the link negotiation signal is modified according to default transmission rate；Described first
Retimer chips include revised link negotiation signal by the SAS cable transmissions to the second processing plate：It is described
Revised link negotiation signal is transferred to by the first Retimer chips by the SAS cables according to default transmission rate
The second processing plate, wherein, the default transmission rate is logical between first process plate and the second processing plate
Believe the peak transfer rate that link is supported.
It is described logical in second of possible implementation with reference to second aspect or the first possible implementation
Letter system also includes the 2nd Retimer chips, and the second controller of the second processing plate passes through the 2nd Retimer chips
It is attached with the SAS cables, methods described also includes：The 2nd Retimer chips are to the first Retimer chips
Revised link negotiation signal is modified again, and revised link negotiation signal will be transferred to again at described second
Manage the controller of plate；The second processing plate is according to the revised link negotiation signal of the first Retimer chips to described
First process plate, which returns to link response signal, to be included：The controller of the second processing plate is according to the 2nd Retimer chips
Revised link negotiation signal returns to link response signal to first process plate.
With reference to any one in second aspect or the first possible implementation to second of possible implementation
Kind, in the third possible implementation, the SAS cables include SAS cable or SAS optical cables, wherein：If the SAS lines
Cable is SAS cable, then the length of the SAS cable is not less than 0.5 meter；If or the SAS cables are SAS optical cables, the SAS
The length of optical cable is not less than 10 meters.
The one or more technical schemes provided in the embodiment of the present invention, have at least the following technical effects or advantages：
In the embodiment of the present invention, when the first process plate is connected with second processing plate by SAS cables, in the first process plate
The first controller and SAS cables between connect band clock and data recovery function high speed signal driving element Retimer chips,
And it be optical mode to set the mode of operation of the first process plate and second processing plate, the Retimer chips are for correcting described the
The link negotiation signal that one controller is sent, and revised link negotiation signal is sent to by the SAS cables described
Second processing plate.So as to by amendment of the Retimer chips to signal, reduce signal and pass through SAS link transmitting procedure
In decay.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structure chart one of communication system in the embodiment of the present invention；
Fig. 2A is the schematic diagram of the OOB signals of power mode in the embodiment of the present invention；
Fig. 2 B are the schematic diagram of the OOB signals of optical mode in the embodiment of the present invention；
Fig. 3 A are the application schematic diagram one of communication system in the embodiment of the present invention；
Fig. 3 B are the application schematic diagram two of communication system in the embodiment of the present invention；
Fig. 4 is the schematic diagram of Retimer chip transmission signals in the embodiment of the present invention；
Fig. 5 is the structure chart two of communication system in the embodiment of the present invention；
Fig. 6 is the flow chart of communication means in the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.
Embodiment one
The present embodiment provides a kind of communication system, refer to Fig. 1, and Fig. 1 is the structure of communication system in the embodiment of the present application
Figure, the communication system include the first process plate 11, the Retimer chips 13 of second processing plate 12 and the first, wherein：
The first Retimer chips 13 and the controller 111 of first process plate 11 are attached by circuit, institute
The first process plate 11 is stated to be attached by system for serial small computer interface SAS cables 14 with the second processing plate 12,
The first Retimer chips 13 are the high speed signal driving element with clock and data recovery function；
First process plate 11, for when detect be connected with the SAS cables 14 in first process plate 11 when,
Transmission link negotiation signal, wherein, the mode of operation of first process plate 11 is optical mode, and the link negotiation signal is institute
State the signal that the first process plate 11 is sent under optical mode；
The first Retimer chips 13, for the information in the link negotiation signal to the link negotiation
Signal is modified, and revised link negotiation signal is transferred into the second processing plate 12 by the SAS cables 14；
The second processing plate 12, for according to the 13 revised link negotiation signal of the first Retimer chips to
First process plate 11 returns to link response signal, is communicated to connect with being established with first process plate 11, wherein, described the
The mode of operation of two process plates 12 is optical mode.
In specific implementation process, the controller 111 can be controller chip, or application specific integrated circuit
(Application Specific Integrated Circuits, ASIC), is not restricted in the present embodiment.
In specific implementation process, as shown in figure 1, the controller 121 of second processing plate 12 passes through circuit and SAS cables 14
Connection, the signal that the link response signal returns for the controller 121 of second processing plate 12.
In the embodiment of the present application, the link negotiation signal that the first process plate 11 is sent is a kind of electric signal, specifically
When being operated in optical mode for the first process plate 11, the out of band signal (Out Of Band signal, OOB) of the optical mode of transmission.
The link response signal that second processing plate 12 returns is also a kind of electric signal, specially the work of second processing plate 12
Make the OOB signals of optical mode sent in optical mode.
In the embodiment of the present application, no matter SAS cables 14 are SAS cable or SAS optical cables, are respectively provided with the first process plate 11
Optical mode is operated in second processing plate 12, and it is as follows using the OOB signals of optical mode to carry out the principle of link negotiation：
Retimer chips must be by the hopping edge in the signal that receives come the phase of locking signal, with recovered clock
And data, losing lock occurs in Retimer chips if not having continuous hopping edge in signal, can not normal work.
And SAS host-host protocols provide, it is necessary to first use link negotiation signal before being carried out data transmission by SAS link
With link response signal, i.e. OOB signals are consulted to establish transmission link.It is past in the prior art when SAS cables are SAS cable
Consult to establish transmission link using the OOB signals of power mode toward acquiescence.
Fig. 2A is refer to, Fig. 2A is the schematic diagram of the OOB signals of power mode, and as shown in Figure 2 A, the OOB signals of power mode are
Burst, by certain length burst during and no signal sky during form.When Retimer chip applications are in SAS link
When, a stable level can be remained for a long time during the sky of the OOB signals of power mode, it is impossible to provide enough hopping edges to protect
Card Retimer chips lock the phase of the signal, so as to cause losing lock.
In order to solve Retimer chip applications when the SAS link, the negotiation phase losing lock the problem of, in the present embodiment,
Setting no matter SAS cables are SAS cable or SAS optical cables, the first process plate 11 and second processing plate 12 are operated in optical mode,
And consult to establish transmission link using the OOB signals of optical mode.
Fig. 2 B are refer to, Fig. 2 B are the schematic diagram of the OOB signals of optical mode, and as shown in Figure 2 B, the OOB signals of optical mode are
Continue skip signal, also by being formed during the burst of certain length and during sky.But during its sky with during burst be length not
With data flow, also have hopping edge during empty, i.e. the OOB signals of optical mode can provide enough hopping edges to ensure
Retimer chips lock the phase of the signal, so as to ensure Retimer chips normal work in SAS link.
In the embodiment of the present application, ensureing the first Retimer chips 13 in the communication system including SAS cables 14 just
Often on the basis of work, the first Retimer chips 13 are modified to the signal received.
Specifically, the first Retimer chips 13 signal received is modified including：First process plate 11 is sent out
The amendment of the link negotiation signal sent, and the amendment of the link response signal returned to second processing plate 12, separately below in detail
State.
The first situation：The amendment of the link negotiation signal sent to the first process plate 11.
The controller 111 of first process plate 11 is under optical mode, transmission link negotiation signal to the first Retimer chips
13；
Enough and continuous skip signals that first Retimer chips 13 are provided based on link negotiation signal, described in locking
The phase of link negotiation signal, to obtain the clock of the link negotiation signal, then the clock by acquisition, recover outgoing link association
The data of business's signal；
Clock of the first Retimer chips 13 based on acquisition and the data correction link negotiation signal recovered, and will repair
After link negotiation signal after just carries out gain compensation by predetermined amplitude, sent by SAS cables 14 to second processing plate 12.
Second case：The amendment of the link response signal returned to second processing plate 12.
Second processing plate 12, according to 13 revised link negotiation signal of the first Retimer chips, passes through under optical mode
SAS cable 14, link response signal is returned to the first Retimer chips 13；
Enough and continuous skip signals that first Retimer chips 13 are provided based on link response signal, described in locking
The phase of link response signal, to obtain the clock of the link response signal, then the clock by acquisition, recover outgoing link and ring
The data of induction signal；
Clock of the first Retimer chips 13 based on acquisition and the data correction link response signal recovered, and will repair
After link response signal carries out gain compensation by predetermined amplitude after just, send to the controller 111 of the first process plate 11.
To sum up, the signal that the first Retimer chips 13 are arrived with the clock and data corrected received that recover, and to signal with
Predetermined amplitude retransmits revised signal after carrying out gain compensation, part decay when offseting signal transmits by SAS cable,
And then reduce signal and pass through the decay in SAS link transmitting procedure.
Further, the signal that the first Retimer chips 13 are arrived with the clock and data corrected received that recover, equivalent to
The clock and data that recover regenerate the signal received, eliminate signal and are transferred to the first Retimer cores by transmitting terminal
Caused signal jitter during piece 13, so as to reduce signal jitter caused by whole SAS link transmission signal so that
The signal that signal receiving end receives is undistorted.
With reference to Fig. 3 A and Fig. 3 B, to illustrate how the communication system that the present embodiment provides is used to reduce SAS link biography
The shake and decay of defeated signal：
Fig. 3 A are refer to, master control borad 301 is connected with subtending board 302 by SAS cables 14, and control is provided with master control borad 301
Device 111 processed, controller 121 is provided with subtending board 302.
When controller 111 sends signal by SAS cables 14 to controller 121, the decay for signal, it is assumed that signal
Transmitted by the controller 111 of master control borad 301 to the interface of SAS cables 14 and master control borad 301 and decay to 18db, pass through SAS
Cable 14 transmits to the 16db that decays to of the controller 121 of subtending board 302, whole link and decays to 34db, exceed
Requirement of the SAS3.0 host-host protocols to decay.
Shake for signal, transmitted in signal by the controller 111 of master control borad 301 to SAS cables 14 and master control borad 301
Interface during, signal jitter aggravation, but now signal is still discernible signal, and SAS cables are continued through in signal
During 14 transmit the controller 121 to subtending board 302, the shake of signal is further exacerbated by, and causes signal to cascade reaching
It not can recognize that during the controller 121 of plate 302.
As shown in Figure 3 B, the communication system provided using the present embodiment, data are forwarded by the first Retimer chips 13
When, the decay for signal, it is assumed that signal is transmitted to SAS cables 14 and master control borad 301 by the controller 111 of master control borad 301
Interface decays to 18db, is transmitted by SAS cables 14 to the 16db that decays to of the controller 121 of subtending board 302, and first
Retimer chips 13 are modified to signal and carry out gain compensation by default amplitude, 20db gain are provided to signal, then
Whole link decays to 14db, meets requirement of the SAS3.0 host-host protocols to decay.
Shake for signal, transmitted in signal by the controller 111 of master control borad 301 to the first Retimer chips 13
During, signal jitter aggravation, but now signal is still discernible signal, the first Retimer chips 13 are modified to signal,
With signal jitter caused by all or part of elimination transmission, the less signal of shake after original is concurrently returned to subtending board 302
Controller 121, during signal continues through the controller 121 that SAS cables 14 are transmitted to subtending board 302, signal is trembled
Although dynamic aggravation, when being transmitted due to no cumulative signal by the controller 111 of master control borad 301 to the first Retimer chips 13
Caused shake, therefore signal is still recognizable.
Further, because SAS host-host protocols provide, in link negotiation, between the first process plate 11 and second processing plate 12
Need to come and go and repeatedly send OOB signals to carry out link negotiation, and the transmission rate of OOB signals needs to enter between different rates
Row switching, and the time for switching requirement is very short, if the first Retimer chips 13 switch in the transmission rate of each SAS link
Shi Jun goes to relock the phase of the signal of transmission, then occurs that the first Retimer chips 13 relock time of phase and surpassed
The situation of transmission rate switching time as defined in SAS host-host protocols is crossed, and then causes Transmission.
In the embodiment of the present application, in order to improve the switch speed of SAS link transmission rate, the first Retimer cores are set
Piece 13, according to the information in the link negotiation signal, the link negotiation signal is repaiied according to default transmission rate
Just, and by revised link negotiation signal by the SAS cables 14 it is transferred to described second according to default transmission rate
Process plate 12, wherein, the default transmission rate is the communication between first process plate 11 and the second processing plate 12
The peak transfer rate that link is supported.
By the way that the transmission rate of the first Retimer chips 13 is locked in into the scheduled rate, the first Retimer is avoided that
Chip 13 relocks time loss caused by phase.
In specific implementation process, because SAS3.0 host-host protocols provide that the transmission rate of SAS link needs
Switched between 1.5Gbps, 3Gbps, 6Gbps, 12Gbps, it is possible to which it is specially 12Gbps to set the predeterminated frequency.
Below, 6Gbps speed is transmitted to second processing plate 12 by the first Retimer chips 13 with the first process plate 11
Exemplified by 01 yard of shape, to illustrate the step of the first Retimer chips 13 are modified with default transmission rate to signal：
First process plate 11 sends the Retimer chips 13 of 01 yard of shape 401 to the first of 6Gbps speed as shown in Figure 4；
First Retimer chips 13 are modified using 12Gbps speed to 01 yard of shape of the 6Gbps speed, amendment
Go out 0011 yard of shape 402 of 12Gbps speed；
0011 yard of shape 402 of the first Retimer chips 13 output 12Gbps speed is to second processing plate 12；
Second processing plate 12 receives 0011 yard of shape 402 of 12Gbps speed with 6Gbps speed, obtains 6Gbps speed
01 yard of shape 401.
To sum up, set the first Retimer chips 13 with speed maximum in the transmission frequency of support to the signal that receives
Repaired, on the one hand improve the switch speed of the transmission rate of SAS link, on the other hand also ensureing that transmitting data does not lose
On the basis of genuine, prevent high speed signal driving element and relock Transmission caused by the overlong time of signal phase,
Realize the technique effect for improving SAS link transmission reliability.
Preferably, the SAS cables 14 can be SAS cable or SAS optical cables, it is contemplated that the length of SAS cables 14 is longer, letter
Number transmission attenuation is bigger, therefore when the length of SAS cables 14 is longer, it is more suitable for correct link negotiation believing using Retimer chips
Number to reduce signal attenuation, even described SAS cables 14 are SAS cable, then the length of the SAS cable is not less than 0.5 meter；Or
If the SAS cables 14 are SAS optical cables, the length of the SAS optical cables is not less than 10 meters.
Under a kind of situation, the SAS cables 14 can be SAS cable, and generally, the length of the SAS cable is not less than 0.5
Rice.In order to ensure signal quality, the length of SAS cable can be not more than 6 meters.Under another situation, the SAS cables 14 can be with
For SAS optical cables, generally, the length of the SAS optical cables is not less than 10 meters.In order to ensure signal quality, the length of SAS optical cables can be with
No more than 100 meters.
Based on same inventive concept, the invention provides another embodiment, detailed in Example two.
Embodiment two：
A kind of communication system is provided in embodiment two, refer to Fig. 5, Fig. 5 is communication system in the embodiment of the present application two
The structure chart of system, the communication system include the first process plate 11, the second processing plate 12 and first that embodiment one provides
Retimer chips 13, in addition to：
2nd Retimer chips 51, the controller 121 of the 2nd Retimer chips 51 and the second processing plate 12
It is attached by circuit, for the revised link negotiation signal that is sent to the first Retimer chips 13 again
It is secondary to be modified, and revised link negotiation signal again is transferred to the controller 121 of the second processing plate 12；
The second processing plate 12, specifically for being believed according to the 51 revised link negotiation of the 2nd Retimer chips
Number the link response signal is returned to first process plate 11, communicated to connect with being established with first process plate 11, its
In, the mode of operation of the second processing plate 12 is optical mode.
In the embodiment of the present application, second processing plate 12 also can to the link response signal that the first process plate 11 returns
By being transmitted after the amendment of the 2nd Retimer chips 51 and the first Retimer chips 13 to the first process plate 11, detailed step
For：
Second processing plate 12 returns under optical mode according to 51 revised link negotiation signal of the 2nd Retimer chips
Link response signal is to the 2nd Retimer chips 51；
2nd Retimer chips 51 are modified to the link response signal received, then by SAS link by after amendment
Link response signal send to the first Retimer chips 13；
First Retimer chips 13 are corrected again to 51 revised link response signal of the 2nd Retimer chips；
First Retimer chips 13 revised link response signal will be sent to the first process plate 11 again.
Specifically, set two Retimer chips to correct the signal of transmission, can further reduce signal attenuation, together
When further reduce shake in signals transmission, meet to want signal attenuation and signal jitter when link cabling is long
Ask.
Based on same inventive concept, the invention provides another embodiment, detailed in Example three.
Embodiment three：
A kind of communication means is provided in embodiment three, applied in communication system, the communication system includes first
Process plate, second processing plate and the first Retimer chips, wherein, first process plate passes through with the second processing plate
System for serial small computer interface SAS cables are attached, the first controller of first process plate and described first
Retimer chips are attached by circuit, and the first Retimer chips are the high speed with clock and data recovery function
Signal driver part.
In the present embodiment, the communication system can be the communication system that embodiment one or embodiment two provide.
As shown in fig. 6, methods described includes：
Step S601, the first process plate transmission link negotiation signal；Wherein, the mode of operation of first process plate
For optical mode, the link negotiation signal is the signal that first process plate is sent under optical mode；
Step S602, the first Retimer chips receive the link negotiation signal；
Step S603, information of the first Retimer chips in the link negotiation signal are assisted to the link
Business's signal is modified；
Revised link negotiation signal is passed through the SAS cable transmissions by step S604, the first Retimer chips
To the second processing plate；
Step S605, the second processing plate according to the revised link negotiation signal of the first Retimer chips to
First process plate returns to link response signal, is communicated to connect with being established with first process plate, wherein, at described second
The mode of operation for managing plate is optical mode.
Preferably, information of the first Retimer chips in the link negotiation signal is to the link negotiation
Signal be modified including：
Information of the first Retimer chips in the link negotiation signal, according to default transmission rate pair
The link negotiation signal is modified；
The first Retimer chips are by revised link negotiation signal by the SAS cable transmissions to described the
Two process plates include：
The first Retimer chips are by revised link negotiation signal by the SAS cables according to default biography
Defeated speed rates give the second processing plate, wherein, the default transmission rate is first process plate and described second
The peak transfer rate that communication link between process plate is supported.
Preferably, the communication system also includes the 2nd Retimer chips, the second controller of the second processing plate leads to
Cross the 2nd Retimer chips to be attached with the SAS cables, methods described also includes：
The 2nd Retimer chips are carried out again to the revised link negotiation signal of the first Retimer chips
Correct, and revised link negotiation signal again is transferred to the controller of the second processing plate；
The second processing plate is according to the revised link negotiation signal of the first Retimer chips at described first
Reason plate, which returns to link response signal, to be included：
The controller of the second processing plate is according to the revised link negotiation signal of the 2nd Retimer chips to institute
State the first process plate and return to link response signal.
Preferably, the SAS cables include SAS cable or SAS optical cables, wherein：
If the SAS cables are SAS cable, the length of the SAS cable is not less than 0.5 meter；Or
If the SAS cables are SAS optical cables, the length of the SAS optical cables is not less than 10 meters.
It should be noted that the system and method that the embodiment of the present application provides are not only used in and connected by SAS cables
Multiple process plates on, can also be with the controller chassis that is connected by SAS cables and cascade frame, the controller chassis and the level
Disk can be included in connection frame.It is understood that as long as two communication nodes connected by SAS cables 14 can make
With system and method provided in an embodiment of the present invention.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage：
In the embodiment of the present invention, when the first process plate is connected with second processing plate by SAS cables, in the first process plate
The first controller and SAS cables between connect band clock and data recovery function high speed signal driving element Retimer chips,
And it be optical mode to set the mode of operation of the first process plate and second processing plate, the Retimer chips are for correcting described the
The link negotiation signal that one controller is sent, and revised link negotiation signal is sent to by the SAS cables described
Second processing plate.So as to by amendment of the Retimer chips to signal, reduce signal and pass through SAS link transmitting procedure
In decay.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (8)
- A kind of 1. communication system, it is characterised in that including the first process plate, second processing plate and the first Retimer chips, its In：The first Retimer chips and the controller of first process plate are attached by circuit, first processing Plate is attached with the second processing plate by system for serial small computer interface SAS cables, the first Retimer cores Piece is the high speed signal driving element with clock and data recovery function；First process plate, for when detect be connected with the SAS cables in first process plate when, transmission link association Business's signal, wherein, the mode of operation of first process plate is optical mode, and the link negotiation signal is first process plate The electric signal sent under optical mode, the link negotiation signal is to continue skip signal, for providing hopping edge so that described First Retimer chips lock the phase of the link negotiation signal；The first Retimer chips, the link negotiation signal is entered for the information in the link negotiation signal Row amendment, and give revised link negotiation signal to the second processing plate by the SAS cable transmissions；The second processing plate, for according to the revised link negotiation signal of the first Retimer chips to described first Process plate returns to link response signal, is communicated to connect with being established with first process plate, wherein, the work of the second processing plate Operation mode is optical mode.
- 2. communication system according to claim 1, it is characterised in that：The first Retimer chips, specifically for the information in the link negotiation signal, according to default transmission speed Rate is modified to the link negotiation signal, and by revised link negotiation signal by the SAS cables according to default Transmission rate be transferred to the second processing plate, wherein, the default transmission rate be first process plate with it is described The peak transfer rate that communication link between second processing plate is supported.
- 3. communication system according to claim 1 or 2, it is characterised in that also include：2nd Retimer chips, the controller of the 2nd Retimer chips and the second processing plate are connected by circuit Connect, the revised link negotiation signal for being sent to the first Retimer chips is modified again, and will again Secondary revised link negotiation signal is transferred to the controller of the second processing plate；The second processing plate, specifically for according to the revised link negotiation signal of the 2nd Retimer chips to described First process plate returns to the link response signal, is communicated to connect with being established with first process plate, wherein, at described second The mode of operation for managing plate is optical mode.
- 4. communication system according to claim 1 or 2, it is characterised in that the SAS cables include SAS cable or SAS light Cable, wherein：If the SAS cables are SAS cable, the length of the SAS cable is not less than 0.5 meter；OrIf the SAS cables are SAS optical cables, the length of the SAS optical cables is not less than 10 meters.
- 5. a kind of communication means, applied in communication system, it is characterised in that the communication system includes the first process plate, the Two process plates and the first Retimer chips, wherein, first process plate passes through serial small meter with the second processing plate Calculation machine system interface SAS cables are attached, and the first controller of first process plate leads to the first Retimer chips Oversampling circuit is attached, and the first Retimer chips are the high speed signal driving element with clock and data recovery function, Methods described includes：The first process plate transmission link negotiation signal；Wherein, the mode of operation of first process plate is optical mode, described Link negotiation signal is the electric signal that first process plate is sent under optical mode, and the link negotiation signal is to continue saltus step Signal, for providing hopping edge so that the first Retimer chips lock the phase of the link negotiation signal；The first Retimer chips receive the link negotiation signal；Information of the first Retimer chips in the link negotiation signal is repaiied to the link negotiation signal Just；The first Retimer chips give revised link negotiation signal at described second by the SAS cable transmissions Manage plate；The second processing plate is according to the revised link negotiation signal of the first Retimer chips to first process plate Link response signal is returned, is communicated to connect with being established with first process plate, wherein, the mode of operation of the second processing plate For optical mode.
- 6. communication means according to claim 5, it is characterised in that the first Retimer chips are according to the link Information in negotiation signal the link negotiation signal is modified including：Information of the first Retimer chips in the link negotiation signal, according to default transmission rate to described Link negotiation signal is modified；The first Retimer chips give revised link negotiation signal at described second by the SAS cable transmissions Reason plate includes：The first Retimer chips are by revised link negotiation signal by the SAS cables according to default transmission speed Rate is transferred to the second processing plate, wherein, the default transmission rate is first process plate and the second processing The peak transfer rate that communication link between plate is supported.
- 7. the communication means according to claim 5 or 6, it is characterised in that the communication system also includes the 2nd Retimer Chip, the second controller of the second processing plate are attached by the 2nd Retimer chips with the SAS cables, Methods described also includes：The 2nd Retimer chips are modified again to the revised link negotiation signal of the first Retimer chips, And revised link negotiation signal again is transferred to the controller of the second processing plate；The second processing plate is according to the revised link negotiation signal of the first Retimer chips to first process plate Returning to link response signal includes：The controller of the second processing plate is according to the revised link negotiation signal of the 2nd Retimer chips to described One process plate returns to link response signal.
- 8. the communication means according to claim 5 or 6, it is characterised in that the SAS cables include SAS cable or SAS light Cable, wherein：If the SAS cables are SAS cable, the length of the SAS cable is not less than 0.5 meter；OrIf the SAS cables are SAS optical cables, the length of the SAS optical cables is not less than 10 meters.
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| CN109918329B (en) * | 2019-02-28 | 2020-11-10 | 苏州浪潮智能科技有限公司 | Communication system and communication method for configuring Retimer chip |
| CN110750481A (en) * | 2019-10-21 | 2020-02-04 | 北京小米移动软件有限公司 | Electronic device, signal transmission method, and storage medium |
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| US7280589B2 (en) * | 2003-07-24 | 2007-10-09 | Sun Microsystems, Inc. | Source synchronous I/O bus retimer |
| CN101577586A (en) * | 2009-06-08 | 2009-11-11 | 中兴通讯股份有限公司 | Method and system for realizing optical fibre interconnection based on SAS/SATA interface |
| CN103475695A (en) * | 2013-08-21 | 2013-12-25 | 华为数字技术（成都）有限公司 | Interconnection method and device for storage system |
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| US7280589B2 (en) * | 2003-07-24 | 2007-10-09 | Sun Microsystems, Inc. | Source synchronous I/O bus retimer |
| CN101577586A (en) * | 2009-06-08 | 2009-11-11 | 中兴通讯股份有限公司 | Method and system for realizing optical fibre interconnection based on SAS/SATA interface |
| CN103475695A (en) * | 2013-08-21 | 2013-12-25 | 华为数字技术（成都）有限公司 | Interconnection method and device for storage system |
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