CN104052642A - Communication system and method - Google Patents
Communication system and method Download PDFInfo
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- CN104052642A CN104052642A CN201410259102.5A CN201410259102A CN104052642A CN 104052642 A CN104052642 A CN 104052642A CN 201410259102 A CN201410259102 A CN 201410259102A CN 104052642 A CN104052642 A CN 104052642A
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Abstract
The invention discloses a communication system and method. The communication system comprises a first processing panel, a second processing panel and a first Retimer chip, wherein the first Retimer chip is connected with a controller of the first processing panel, the first processing panel is connected with the second processing panel through a serial small computer system interface SAS cable, the first processing panel is used for sending link negotiation signals in a light mode, the first Retimer chip is used for correcting the link negotiation signals and transmitting the corrected link negotiation signals to the second processing panel through the SAS cable, and the second processing panel is used for feeding link response signals back to the first processing panel according to the corrected link negotiation signals in the light mode. The communication system and method are used for solving the technical problem of the prior art that with the increase of the signal transmission rate of an SAS link or the increase of the length of the link, signal attenuation is severe during signal transmission.
Description
Technical field
The present invention relates to the communications field, relate in particular 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 the transfer of data between memory.
At present, update along with product, the transmission technology of SAS link has entered the third generation, corresponding SAS host-host protocol is also upgraded to SAS3.0 agreement, signal transmission rate in SAS3.0 agreement is promoted to 12G by 6G, meanwhile, due to the requirement having increased optical cable access, the requirement of in SAS3.0 agreement, the decay of signal being controlled is also stricter.
Yet during SAS link transmission signal, along with the lifting of signal transmission rate, or along with the increase of linkage length, the decay of signal also increases thereupon.
Summary of the invention
The invention provides a kind of communication system and communication means, in order to solve in prior art, along with the lifting of the signal transmission rate of SAS link, or the increase of linkage length, the technical problem that the decay of signal in transmitting procedure is larger.
First aspect, the invention provides a kind of communication system, comprise the first disposable plates, the second disposable plates and a Retimer chip, wherein: a described Retimer chip is connected by circuit with the controller of described the first disposable plates, described the first disposable plates is connected by system for serial small computer interface SAS cable with described the second disposable plates, and a described Retimer chip is the high speed signal driving element with clock and data recovery function; Described the first disposable plates, while being used for being connected with described SAS cable on described the first disposable plates being detected, send link negotiation signal, wherein, the mode of operation of described the first disposable plates is optical mode, and described link negotiation signal is the signal that described the first disposable plates sends under optical mode; A described Retimer chip, for according to the information of described link negotiation signal, described link negotiation signal being revised, and gives described the second disposable plates by revised link negotiation signal by described SAS cable transmission; Described the second disposable plates, be used for according to the revised link negotiation signal of a described Retimer chip to described the first disposable plates return link response signal, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
In conjunction with first aspect, in the possible implementation of the first, a described Retimer chip, specifically for according to the information in described link negotiation signal, according to default transmission rate, described link negotiation signal is revised, and revised link negotiation signal is transferred to described the second disposable plates by described SAS cable according to default transmission rate, wherein, described default transmission rate is the peak transfer rate that the communication link between described the first disposable plates and described the second disposable plates is supported.
In conjunction with first aspect or the possible implementation of the first, in the possible implementation of the second, described communication system also comprises: the 2nd Retimer chip, described the 2nd Retimer chip is connected by circuit with the controller of described the second disposable plates, for the described revised link negotiation signal that a described Retimer chip is sent, again revise, and revised link negotiation signal is again transferred to the controller of described the second control board; Described the second disposable plates, specifically for returning to described link response signal according to the revised link negotiation signal of described the 2nd Retimer chip to described the first disposable plates, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
In conjunction with first aspect or the possible implementation of the first to any one in the possible implementation of the second, in the third possible implementation, described SAS cable comprises SAS cable or SAS optical cable, wherein: if described SAS cable is SAS cable, the length of described SAS cable is not less than 0.5 meter; If or described SAS cable is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
Second aspect, the invention provides a kind of communication means, be applied in communication system, described communication system comprises the first disposable plates, the second disposable plates and a Retimer chip, wherein, described the first disposable plates is connected by system for serial small computer interface SAS cable with described the second disposable plates, the first controller of described the first disposable plates is connected by circuit with a described Retimer chip, a described Retimer chip is the high speed signal driving element with clock and data recovery function, described method comprises: described the first disposable plates sends link negotiation signal, wherein, the mode of operation of described the first disposable plates is optical mode, and described link negotiation signal is the signal that described the first disposable plates sends under optical mode, a described Retimer chip receives described link negotiation signal, a described Retimer chip is revised described link negotiation signal according to the information in described link negotiation signal, a described Retimer chip is given described the second disposable plates by revised link negotiation signal by described SAS cable transmission, described the second disposable plates according to the revised link negotiation signal of a described Retimer chip to described the first disposable plates return link response signal, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
In conjunction with second aspect, in the possible implementation of the first, a described Retimer chip is revised and is comprised described link negotiation signal according to the information in described link negotiation signal: a described Retimer chip, according to the information in described link negotiation signal, is revised described link negotiation signal according to default transmission rate; A described Retimer chip comprises to described the second disposable plates by described SAS cable transmission revised link negotiation signal: a described Retimer chip is transferred to described second disposable plates by described SAS cable according to default transmission rate by revised link negotiation signal, wherein, described default transmission rate is the peak transfer rate that the communication link between described the first disposable plates and described the second disposable plates is supported.
In conjunction with second aspect or the possible implementation of the first, in the possible implementation of the second, described communication system also comprises the 2nd Retimer chip, the second controller of described the second disposable plates is connected with described SAS cable by described the 2nd Retimer chip, described method also comprises: described the 2nd Retimer chip is revised again to the revised link negotiation signal of a described Retimer chip, and revised link negotiation signal is again transferred to the controller of described the second disposable plates; Described the second disposable plates comprises to described the first disposable plates return link response signal according to the revised link negotiation signal of a described Retimer chip: the controller of described the second disposable plates according to the revised link negotiation signal of described the 2nd Retimer chip to described the first disposable plates return link response signal.
In conjunction with second aspect or the possible implementation of the first to any one in the possible implementation of the second, in the third possible implementation, described SAS cable comprises SAS cable or SAS optical cable, wherein: if described SAS cable is SAS cable, the length of described SAS cable is not less than 0.5 meter; If or described SAS cable is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
The one or more technical schemes that provide in the embodiment of the present invention, at least have following technique effect or advantage:
In the embodiment of the present invention, when the first disposable plates is connected by SAS cable with the second disposable plates, the high speed signal driving element Retimer chip of connecting band clock and data recovery function between the first controller of the first disposable plates and SAS cable, and the mode of operation that the first disposable plates and the second disposable plates are set is optical mode, the link negotiation signal that described Retimer chip sends for revising described the first controller, and revised link negotiation signal is sent to described the second disposable plates by described SAS cable.Thereby the correction by described Retimer chip to signal, has reduced signal by the decay in SAS link transmission process.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structure chart one of communication system in the embodiment of the present invention;
Fig. 2 A is the schematic diagram of the OOB signal of power mode in the embodiment of the present invention;
Fig. 2 B is the schematic diagram of the OOB signal of optical mode in the embodiment of the present invention;
Fig. 3 A is the application schematic diagram one of communication system in the embodiment of the present invention;
Fig. 3 B is the application schematic diagram two of communication system in the embodiment of the present invention;
Fig. 4 is the schematic diagram of Retimer chip signal transmission 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
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.
Embodiment mono-
The present embodiment provides a kind of communication system, please refer to Fig. 1, and Fig. 1 is the structure chart of communication system in the embodiment of the present application, and described communication system comprises the first disposable plates 11, the second disposable plates 12 and a Retimer chip 13, wherein:
A described Retimer chip 13 is connected by circuit with the controller 111 of described the first disposable plates 11, described the first disposable plates 11 is connected by system for serial small computer interface SAS cable 14 with described the second disposable plates 12, and a described Retimer chip 13 is for having the high speed signal driving element of clock and data recovery function;
Described the first disposable plates 11, while being used for being connected with described SAS cable 14 on described the first disposable plates 11 being detected, send link negotiation signal, wherein, the mode of operation of described the first disposable plates 11 is optical mode, and described link negotiation signal is the signal that described the first disposable plates 11 sends under optical mode;
A described Retimer chip 13, for according to the information of described link negotiation signal, described link negotiation signal being revised, and is transferred to described the second disposable plates 12 by revised link negotiation signal by described SAS cable 14;
Described the second disposable plates 12, be used for according to the revised link negotiation signal of a described Retimer chip 13 to described the first disposable plates 11 return link response signals, to establish a communications link with described the first disposable plates 11, wherein, the mode of operation of described the second disposable plates 12 is optical mode.
In specific implementation process, described controller 111 can be controller chip, also can, for application-specific integrated circuit (ASIC) (Application Specific Integrated Circuits, ASIC), not be restricted in the present embodiment.
In specific implementation process, as shown in Figure 1, the controller 121 of the second disposable plates 12 is connected with SAS cable 14 by circuit, the signal that the controller 121 that described link response signal is the second disposable plates 12 returns.
In the embodiment of the present application, the described link negotiation signal that the first disposable plates 11 sends is a kind of signal of telecommunication, when being specially the first disposable plates 11 and being operated in optical mode, and the out of band signal of the optical mode of transmission (Out Of Band signal, OOB).
The described link response signal that the second disposable plates 12 is returned is also a kind of signal of telecommunication, is specially the OOB signal of the optical mode sending when the second disposable plates 12 is operated in optical mode.
In the embodiment of the present application, no matter SAS cable 14 is SAS cable or SAS optical cable, the first disposable plates 11 is all set and the second disposable plates 12 is operated in optical mode, and it is as follows to adopt the OOB signal of optical mode to carry out the principle of link negotiation:
Retimer chip must carry out the phase place of locking signal by the hopping edge in the signal receiving, with recovered clock and data, if there is no continuous hopping edge in signal, Retimer chip there will be losing lock, cannot normally work.
And SAS host-host protocol regulation is being undertaken before transfer of data by SAS link, need to first use link negotiation signal and link response signal, OOB signal consults to set up transmission link.In prior art, when SAS cable is SAS cable, often acquiescence adopts the OOB signal of power mode to consult to set up transmission link.
Please refer to Fig. 2 A, the schematic diagram of the OOB signal that Fig. 2 A is power mode, as shown in Figure 2 A, the OOB signal of power mode is burst, by forming between the burst period of certain length and during the sky of no signal.When Retimer chip application is during in SAS link, during the sky of the OOB signal of power mode, can remain for a long time a stable level, can not provide enough hopping edges to guarantee that Retimer chip locks the phase place of this signal, thereby cause losing lock.
In order to solve Retimer chip application when the SAS link, problem in negotiation phase losing lock, in the present embodiment, arrange no matter SAS cable is SAS cable or SAS optical cable, the first disposable plates 11 and the second disposable plates 12 are all operated in optical mode, and consult to set up transmission link with the OOB signal of optical mode.
Please refer to Fig. 2 B, the schematic diagram of the OOB signal that Fig. 2 B is optical mode, as shown in Figure 2 B, the OOB signal of optical mode is for continuing skip signal, also by forming between the burst period of certain length He during sky.But during its sky between burst period, be the data flow that length is different, during sky, also there is hopping edge, the enough hopping edges that can provide that are the OOB signal of optical mode guarantee that Retimer chip locks the phase place of this signal, thereby assurance Retimer chip is normally worked in SAS link.
In the embodiment of the present application, on the basis of normally working in assurance the one Retimer chip 13 is comprising the communication system of SAS cable 14, a Retimer chip 13 is revised to the received signal.
Specifically, a Retimer chip 13 is revised and is comprised to the received signal: the correction of the link negotiation signal that the first disposable plates 11 is sent, and the correction of the link response signal that the second disposable plates 12 is returned, describe in detail respectively below.
The first situation: the correction of the link negotiation signal that the first disposable plates 11 is sent.
The controller 111 of the first disposable plates 11, under optical mode, sends link negotiation signal to a Retimer chip 13;
Enough and the continuous skip signal that the one Retimer chip 13 provides based on link negotiation signal, locks the phase place of described link negotiation signal, to obtain the clock of described link negotiation signal, then by the clock obtaining, recovers the data of link negotiation signal;
The clock of the one Retimer chip 13 based on obtaining and the data correction link negotiation signal recovering, and revised link negotiation signal is undertaken after gain compensation by predetermined amplitude, by SAS cable 14, be sent to the second disposable plates 12.
Second case: the correction of the link response signal that the second disposable plates 12 is returned.
The second disposable plates 12 under optical mode, according to the revised link negotiation signal of a Retimer chip 13, by SAS cable 14, return link response signal to a Retimer chip 13;
Enough and the continuous skip signal that the one Retimer chip 13 provides based on link response signal, locks the phase place of described link response signal, to obtain the clock of described link response signal, then by the clock obtaining, recovers the data of link response signal;
The clock of the one Retimer chip 13 based on obtaining and the data correction link response signal recovering, and link response signal after revising is undertaken after gain compensation by predetermined amplitude, be sent to the controller 111 of the first disposable plates 11.
To sum up, the signal that the one Retimer chip 13 receives with the clock that recovers and data correction, and signal is carried out sending revised signal after gain compensation with predetermined amplitude again, part decay during offseting signal process SAS cable transmission, and then reduced signal by the decay in SAS link transmission process.
Further, the signal that the one Retimer chip 13 receives with the clock that recovers and data correction, the clock that is equivalent to recover and data regenerate the signal receiving, eliminated the signal jitter producing in the process that signal is transferred to a Retimer chip 13 by transmitting terminal, thereby the signal jitter having produced while having reduced whole SAS link transmission signal, the signal that signal receiving end is received is undistorted.
Below in conjunction with Fig. 3 A and Fig. 3 B, illustrate that how communication system that the present embodiment provides is for reducing shake and the decay of the signal of SAS link transmission:
Please refer to Fig. 3 A, master control borad 301 is connected by SAS cable 14 with subtending board 302, is provided with controller 111 on master control borad 301, is provided with controller 121 on subtending board 302.
When controller 111 passes through SAS cable 14 to controller 121 transmitted signal, decay for signal, suppose signal by the controller 111 of master control borad 301, transferred to SAS cable 14 and master control borad 301 interface decay to 18db, by SAS cable 14, transfer to subtending board 302 controller 121 decay to 16db, whole link decay to 34db, surpassed the requirement of SAS3.0 host-host protocol to decay.
Shake for signal, at signal, by the controller 111 of master control borad 301, transferred in the process of SAS cable 14 and the interface of master control borad 301, signal jitter aggravation, but now signal is still discernible signal, at signal, continue to transfer to by SAS cable 14 in the process of controller 121 of subtending board 302, the shake of signal further aggravates, and causes signal can not identify when arriving the controller 121 of subtending board 302.
As shown in Figure 3 B, the communication system that adopts the present embodiment to provide, while carrying out forwarding data by a Retimer chip 13, decay for signal, suppose signal by the controller 111 of master control borad 301, transferred to SAS cable 14 and master control borad 301 interface decay to 18db, by SAS cable 14, transfer to subtending board 302 controller 121 decay to 16db, and 13 pairs of signals of a Retimer chip are revised and carry out gain compensation by default amplitude, the gain of 20db is provided to signal, whole link decays to 14db, meet the requirement of SAS3.0 host-host protocol to decay.
Shake for signal, controller 111 at signal by master control borad 301 transfers in the process of a Retimer chip 13, signal jitter aggravation, but now signal is still discernible signal, the one 13 pairs of Retimer chips signal is revised, the signal jitter causing with all or part of elimination transmission, the concurrent less signal of shake after former of returning is to the controller 121 of subtending board 302, at signal, continue to transfer to by SAS cable 14 in the process of controller 121 of subtending board 302, although the shake of signal aggravation, but the shake producing while transferring to a Retimer chip 13 due to the controller 111 that does not have cumulative signal by master control borad 301, therefore signal still can be identified.
Further, due to SAS host-host protocol regulation, when link negotiation, the first disposable plates 11 and 12 needs of the second disposable plates come and go and repeatedly to send OOB signal and carry out link negotiation, and the transmission rate of OOB signal need to be switched between different rates, and the time of switching requirement is very short, if a Retimer chip 13 all goes to relock the phase place of the signal of transmission when the transmission rate of each SAS link is switched, the time that there will be a Retimer chip 13 to relock phase place surpasses the situation of transmission rate switching time of SAS host-host protocol regulation, and then cause Transmission.
In the embodiment of the present application, in order to improve the switch speed of SAS link transmission speed, the one Retimer chip 13 is set, according to the information in described link negotiation signal, according to default transmission rate, described link negotiation signal is revised, and revised link negotiation signal is transferred to described the second disposable plates 12 by described SAS cable 14 according to default transmission rate, wherein, described default transmission rate is the peak transfer rate that the communication link of 12 of described the first disposable plates 11 and described the second disposable plates is supported.
By the transmission rate of a Retimer chip 13 being locked in to described default speed, can avoid a Retimer chip 13 to relock the time loss that phase place causes.
In specific implementation process, because the transmission rate of SAS3.0 host-host protocol regulation SAS link need to be switched between 1.5Gbps, 3Gbps, 6Gbps, 12Gbps, so can being set, described predeterminated frequency is specially 12Gbps.
Below, 01 yard of shape that first disposable plates 11 of take is transmitted 6Gbps speed by a Retimer chip 13 to the second disposable plates 12 is example, and the step that a Retimer chip 13 is revised signal with the transmission rate of presetting is described:
01 yard of shape 401 that the first disposable plates 11 sends 6Gbps speed is as shown in Figure 4 to a Retimer chip 13;
The one Retimer chip 13 is used the speed of 12Gbps to revise 01 of described 6Gbps speed yard of shape, revises out 0011 yard of shape 402 of 12Gbps speed;
0011 yard of shape, 402 to second disposable plates 12 of the one Retimer chip 13 output 12Gbps speed;
The second disposable plates 12 receives 0011 yard of shape 402 of 12Gbps speed with the speed of 6Gbps, obtain 01 yard of shape 401 of 6Gbps speed.
To sum up, the one Retimer chip 13 is set to be repaired to the received signal with speed maximum in the transmission frequency of supporting, promoted on the one hand the switch speed of the transmission rate of SAS link, also guaranteeing on the transmission distortionless basis of data on the other hand, prevent the Transmission that overlong time that high speed signal driving element relocks signal phase causes, realized the technique effect that improves SAS link transmission reliability.
Preferably, described SAS cable 14 can be SAS cable or SAS optical cable, consider that SAS cable 14 length are longer, signal transmission attenuation is larger, therefore in SAS cable 14 length when longer, be more suitable for revising link negotiation signal to reduce signal attenuation with Retimer chip, even described SAS cable 14 is SAS cable, and the length of described SAS cable is not less than 0.5 meter; If or described SAS cable 14 is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
Under a kind of situation, described SAS cable 14 can be SAS cable, and conventionally, the length of described SAS cable is not less than 0.5 meter.In order to ensure signal quality, the length of SAS cable can be not more than 6 meters.Under another kind of situation, described SAS cable 14 can be SAS optical cable, and conventionally, the length of described SAS optical cable is not less than 10 meters.In order to ensure signal quality, the length of SAS optical cable can be not more than 100 meters.
Based on same inventive concept, the invention provides another embodiment, refer to embodiment bis-.
Embodiment bis-:
A kind of communication system is provided in embodiment bis-, please refer to Fig. 5, Fig. 5 is the structure chart of communication system in the embodiment of the present application two, and described communication system comprises the first disposable plates 11, the second disposable plates 12 and the Retimer chip 13 that embodiment mono-provides, and also comprises:
The 2nd Retimer chip 51, described the 2nd Retimer chip 51 is connected by circuit with the controller 121 of described the second disposable plates 12, for the described revised link negotiation signal that a described Retimer chip 13 is sent, again revise, and revised link negotiation signal is again transferred to the controller 121 of described the second disposable plates 12;
Described the second disposable plates 12, specifically for returning to described link response signal according to the revised link negotiation signal of described the 2nd Retimer chip 51 to described the first disposable plates 11, to establish a communications link with described the first disposable plates 11, wherein, the mode of operation of described the second disposable plates 12 is optical mode.
In the embodiment of the present application, the described link response signal that the second disposable plates 12 is returned to the first disposable plates 11 also can be by transferring to the first disposable plates 11 after the correction of the 2nd Retimer chip 51 and a Retimer chip 13, and detailed step is:
The second disposable plates 12 is under optical mode, according to the revised link negotiation signal of the 2nd Retimer chip 51 return link response signal to the two Retimer chips 51;
The link response signal that the 2nd 51 pairs of Retimer chips receive is revised, then by SAS link, revised link response signal is sent to a Retimer chip 13;
The revised link response signal of the one 13 pairs of Retimer chips the 2nd Retimer chip 51 is revised again;
The one Retimer chip 13 again revised link response signal is sent to the first disposable plates 11.
Specifically, the signal that two Retimer chips are revised transmission is set, can further reduces signal attenuation, reduce the shake in signals transmission simultaneously further, meet the requirement to signal attenuation and signal jitter when long of link cabling.
Based on same inventive concept, the invention provides another embodiment, refer to embodiment tri-.
Embodiment tri-:
A kind of communication means is provided in embodiment tri-, be applied in communication system, described communication system comprises the first disposable plates, the second disposable plates and a Retimer chip, wherein, described the first disposable plates is connected by system for serial small computer interface SAS cable with described the second disposable plates, the first controller of described the first disposable plates is connected by circuit with a described Retimer chip, and a described Retimer chip is the high speed signal driving element with clock and data recovery function.
In the present embodiment, the communication system that described communication system can provide for embodiment mono-or embodiment bis-.
As shown in Figure 6, described method comprises:
Step S601, described the first disposable plates sends link negotiation signal; Wherein, the mode of operation of described the first disposable plates is optical mode, and described link negotiation signal is the signal that described the first disposable plates sends under optical mode;
Step S602, a described Retimer chip receives described link negotiation signal;
Step S603, a described Retimer chip is revised described link negotiation signal according to the information in described link negotiation signal;
Step S604, a described Retimer chip is given described the second disposable plates by revised link negotiation signal by described SAS cable transmission;
Step S605, described the second disposable plates according to the revised link negotiation signal of a described Retimer chip to described the first disposable plates return link response signal, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
Preferably, a described Retimer chip is revised and is comprised described link negotiation signal according to the information in described link negotiation signal:
A described Retimer chip, according to the information in described link negotiation signal, is revised described link negotiation signal according to default transmission rate;
A described Retimer chip comprises to described the second disposable plates by described SAS cable transmission revised link negotiation signal:
A described Retimer chip is transferred to described second disposable plates by described SAS cable according to default transmission rate by revised link negotiation signal, wherein, described default transmission rate is the peak transfer rate that the communication link between described the first disposable plates and described the second disposable plates is supported.
Preferably, described communication system also comprises the 2nd Retimer chip, and the second controller of described the second disposable plates is connected with described SAS cable by described the 2nd Retimer chip, and described method also comprises:
Described the 2nd Retimer chip is revised again to the revised link negotiation signal of a described Retimer chip, and revised link negotiation signal is again transferred to the controller of described the second disposable plates;
Described the second disposable plates comprises to described the first disposable plates return link response signal according to the revised link negotiation signal of a described Retimer chip:
The controller of described the second disposable plates according to the revised link negotiation signal of described the 2nd Retimer chip to described the first disposable plates return link response signal.
Preferably, described SAS cable comprises SAS cable or SAS optical cable, wherein:
If described SAS cable is SAS cable, the length of described SAS cable is not less than 0.5 meter; Or
If described SAS cable is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
It should be noted that, the system and method that the embodiment of the present application provides not only can be used in a plurality of disposable plates that connect by SAS cable, also can be used on the controller chassis and cascade frame connecting by SAS cable, in described controller chassis and described cascade frame, can comprise disk.Be understandable that, so long as two system and methods that communication node all can be used the embodiment of the present invention to provide that connect by SAS cable 14.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
In the embodiment of the present invention, when the first disposable plates is connected by SAS cable with the second disposable plates, the high speed signal driving element Retimer chip of connecting band clock and data recovery function between the first controller of the first disposable plates and SAS cable, and the mode of operation that the first disposable plates and the second disposable plates are set is optical mode, the link negotiation signal that described Retimer chip sends for revising described the first controller, and revised link negotiation signal is sent to described the second disposable plates by described SAS cable.Thereby the correction by described Retimer chip to signal, has reduced signal by the decay in SAS link transmission process.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (8)
1. a communication system, is characterized in that, comprises the first disposable plates, the second disposable plates and a Retimer chip, wherein:
A described Retimer chip is connected by circuit with the controller of described the first disposable plates, described the first disposable plates is connected by system for serial small computer interface SAS cable with described the second disposable plates, and a described Retimer chip is the high speed signal driving element with clock and data recovery function;
Described the first disposable plates, while being used for being connected with described SAS cable on described the first disposable plates being detected, send link negotiation signal, wherein, the mode of operation of described the first disposable plates is optical mode, and described link negotiation signal is the signal that described the first disposable plates sends under optical mode;
A described Retimer chip, for according to the information of described link negotiation signal, described link negotiation signal being revised, and gives described the second disposable plates by revised link negotiation signal by described SAS cable transmission;
Described the second disposable plates, be used for according to the revised link negotiation signal of a described Retimer chip to described the first disposable plates return link response signal, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
2. communication system according to claim 1, is characterized in that:
A described Retimer chip, specifically for according to the information in described link negotiation signal, according to default transmission rate, described link negotiation signal is revised, and revised link negotiation signal is transferred to described the second disposable plates by described SAS cable according to default transmission rate, wherein, described default transmission rate is the peak transfer rate that the communication link between described the first disposable plates and described the second disposable plates is supported.
3. communication system according to claim 1 and 2, is characterized in that, also comprises:
The 2nd Retimer chip, described the 2nd Retimer chip is connected by circuit with the controller of described the second disposable plates, for the described revised link negotiation signal that a described Retimer chip is sent, again revise, and revised link negotiation signal is again transferred to the controller of described the second control board;
Described the second disposable plates, specifically for returning to described link response signal according to the revised link negotiation signal of described the 2nd Retimer chip to described the first disposable plates, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
4. according to the communication system described in claim 1-3 any one, it is characterized in that, described SAS cable comprises SAS cable or SAS optical cable, wherein:
If described SAS cable is SAS cable, the length of described SAS cable is not less than 0.5 meter; Or
If described SAS cable is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
5. a communication means, be applied in communication system, it is characterized in that, described communication system comprises the first disposable plates, the second disposable plates and a Retimer chip, wherein, described the first disposable plates is connected by system for serial small computer interface SAS cable with described the second disposable plates, the first controller of described the first disposable plates is connected by circuit with a described Retimer chip, a described Retimer chip is the high speed signal driving element with clock and data recovery function, and described method comprises:
Described the first disposable plates sends link negotiation signal; Wherein, the mode of operation of described the first disposable plates is optical mode, and described link negotiation signal is the signal that described the first disposable plates sends under optical mode;
A described Retimer chip receives described link negotiation signal;
A described Retimer chip is revised described link negotiation signal according to the information in described link negotiation signal;
A described Retimer chip is given described the second disposable plates by revised link negotiation signal by described SAS cable transmission;
Described the second disposable plates according to the revised link negotiation signal of a described Retimer chip to described the first disposable plates return link response signal, to establish a communications link with described the first disposable plates, wherein, the mode of operation of described the second disposable plates is optical mode.
6. communication means according to claim 5, is characterized in that, a described Retimer chip is revised and comprised described link negotiation signal according to the information in described link negotiation signal:
A described Retimer chip, according to the information in described link negotiation signal, is revised described link negotiation signal according to default transmission rate;
A described Retimer chip comprises to described the second disposable plates by described SAS cable transmission revised link negotiation signal:
A described Retimer chip is transferred to described second disposable plates by described SAS cable according to default transmission rate by revised link negotiation signal, wherein, described default transmission rate is the peak transfer rate that the communication link between described the first disposable plates and described the second disposable plates is supported.
7. according to the communication means described in claim 5 or 6, it is characterized in that, described communication system also comprises the 2nd Retimer chip, and the second controller of described the second disposable plates is connected with described SAS cable by described the 2nd Retimer chip, and described method also comprises:
Described the 2nd Retimer chip is revised again to the revised link negotiation signal of a described Retimer chip, and revised link negotiation signal is again transferred to the controller of described the second disposable plates;
Described the second disposable plates comprises to described the first disposable plates return link response signal according to the revised link negotiation signal of a described Retimer chip:
The controller of described the second disposable plates according to the revised link negotiation signal of described the 2nd Retimer chip to described the first disposable plates return link response signal.
8. according to the communication means described in claim 5-7 any one, it is characterized in that, described SAS cable comprises SAS cable or SAS optical cable, wherein:
If described SAS cable is SAS cable, the length of described SAS cable is not less than 0.5 meter; Or
If described SAS cable is SAS optical cable, the length of described SAS optical cable is not less than 10 meters.
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| CN109918329A (en) * | 2019-02-28 | 2019-06-21 | 苏州浪潮智能科技有限公司 | A kind of communication system and communication means 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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| 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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