CN102655442A - Transceiver and related method thereof - Google Patents

Transceiver and related method thereof Download PDF

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Publication number
CN102655442A
CN102655442A CN2011100517508A CN201110051750A CN102655442A CN 102655442 A CN102655442 A CN 102655442A CN 2011100517508 A CN2011100517508 A CN 2011100517508A CN 201110051750 A CN201110051750 A CN 201110051750A CN 102655442 A CN102655442 A CN 102655442A
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Prior art keywords
package
parameter
unit
bit value
adjust
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CN2011100517508A
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CN102655442B (en
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黄亮维
刘峻宏
郭协星
卓文仁
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Realtek Semiconductor Corp
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Realtek Semiconductor Corp
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Abstract

The invention discloses a transceiver and a related method thereof. The transceiver comprises a transmission unit, a receiving unit and a detection unit. The transmission unit transmits a first packet; the receiving unit receives a second packet and receives at least one receiving parameter; and the detection unit is coupled with the transmission unit and the receiving unit and detects the first packet and the second packet so as to regulate the receiving parameter, wherein the detection unit stops regulation of the receiving parameter when detecting that the first packet and the second packet are substantially identical.

Description

R-T unit and correlation technique thereof
Technical field
The present invention relates to a kind of R-T unit, refer to a kind of R-T unit that interference causes packet error that can be used in a communication system, reducing especially.
Background technology
In tradition Fast Ethernet network (Fast Ethernet) system,,, transmit and receive (Tx/Rx) and be divided into two groups of transmission paths, so can not interfere with each other as far as same receiving terminal though be full duplex system.Therefore, both sides can export identical idle sequence (idlesequence) when not transmitting package, because the Fast Ethernet network has two groups of different transmission paths, so also do not have influence even export identical signal.
At first; In Fast Ethernet network environment, because former the design's starting point is the transmission of two groups of transmission paths (respectively for unidirectional), so two sides are not when transmitting package; Can export the idle sequence of identical MLT-3; Because both sides' frequency is different, has of short duration time both sides and export identical signal (this situation is for periodically taking place, and looks what of both sides' frequency drift) in decision cycle.
And HDMI (High Definition Multimedia Interface, application HDMI) is that one group of transmission path carries out transmitted in both directions, except receiving simultaneously to square signal, also need reception itself output bounce-back (echo) signal that echoes of returning.When the signal of both sides output is identical (just expression is identical with response signal to square signal); This moment, receiving terminal can become many suddenly because of the energy of accepting; (Signal-to-noise ratio, the situation that SNR) improves make the convergence coefficient of receiving terminal converge to wrong separating to produce signal to noise ratio.Just in case the other side carries out package transmission just at this moment, because the convergence coefficient of Rx end is wrong, then can cause the situation of packet error to produce.
In addition; In gigabit Ethernet network (Gigabit Ethernet) system, must transmit and receive at same group of transmission path, but because just considered this problem specification institution the time; So it is also inequality that both sides export the idle sequence of MLT-3, do not obscure so can not cause.
Yet, in HDMI 1.4 specifications, utilized the specification of Fast Ethernet network, but because the restriction of transmission medium, this specification will transmit and reception is arranged in the same group of transmission path and transmits.But because of the Fast Ethernet network was not to use the same group of application that transmission path transmits originally,, produce, cause the forfeiture of system effectiveness easily so have the situation of packet error so do not consider this situation.
Summary of the invention
One of main purpose of the present invention is to provide a kind of R-T unit and parameter regulation means, can under the idle sequence situation, reduce the chance of packet error.
One embodiment of the invention provide a kind of R-T unit, comprise a delivery unit, a receiving element and a detecting unit.Delivery unit transmits one first package; Receiving element receives one second package, and receiving element receives at least one reception parameter; Detecting unit couples delivery unit and receiving element, and detection first package and second package are to adjust at least one reception parameter; Wherein, when detection is identical in fact to first package and second package, stops adjustment and receive parameter.
One embodiment of the invention provide a kind of parameter regulation means, comprising:
Transmit one first package; Receive one second package, and receive at least one reception parameter; And detect first package and second package and receive parameter with adjustment; Wherein, when detecting first package when identical in fact, stop adjustment and receive parameter with second package.
Description of drawings
Fig. 1 illustrates an embodiment sketch map of R-T unit of the present invention.
Fig. 2 illustrates an embodiment sketch map of R-T unit of the present invention.
Fig. 3 illustrates an embodiment sketch map of R-T unit of the present invention.
Fig. 4 A illustrates an embodiment sketch map of R-T unit of the present invention.
Fig. 4 B illustrates the sketch map of a bit value generator of one embodiment of the invention.
Fig. 4 C is package P1 and the approaching sketch map of P2 among the embodiment.
Fig. 4 D is package P1 and the approaching sketch map of P2 among the embodiment.
Fig. 4 E be among the embodiment package P1 and P2 away from sketch map.
Fig. 4 F be among the embodiment package P1 and P2 away from sketch map.
Fig. 5 illustrates one embodiment of the invention sketch map.
Fig. 6 is the flow chart of an example operation of parameter regulation means of the present invention.
The primary clustering symbol description
100,200,300,400,500 R-T units
105,405 Physical Coding Sublayers
11 remote-control devices
110 delivery units
111 receiving elements
120 receivers
121 simulation automatic gain controllers
122 analog-to-digital converters
123 digital Auto Gain controllers
124 feed forward equalizers
125 feedback equalizers
126 food slicers
130 equalizers
140,340,440 detecting units
D1~Dn register
405a bit value generator
S600~S608 step
Embodiment
R-T unit 100 of the present invention is to transmit a packet data through a transmission medium, then can transmit an idle sequence (idle sequence) when not transmitting packet data and keep and long-range writing to each other.
Please with reference to Fig. 1, Fig. 1 is the sketch map of a kind of R-T unit 100 of one embodiment of the invention, and R-T unit 100 includes a delivery unit 110, a receiving element 111 and a detecting unit 140.
Wherein, receiving element 111 comprises a receiver 120 and equalizer 130, and delivery unit 110 transmits a package P1; Receiving element 111 receives a package P2; Receiving element 111 receives package P2 according at least one reception parameter; Detection package P1 and P2 receive parameter with adjustment.
In the present invention's one instance; R-T unit 100 also comprises a Physical Coding Sublayer (Physical Coding Sub-Layer; PCS) 105; Whether Physical Coding Sublayer 105 couples delivery unit 110 and receiving element 111, and judges whether delivery unit 110 transmits package P1 or/and whether receiving element 111 receives package P2, receive parameter with decision and restrain.
A remote-control device transmits package P2 in the present embodiment, R-T unit 100 transmission package P1, and remote-control device 11 carries out signal transmission and exchanges data through package P1 and P2 respectively with R-T unit 100.
In addition; In the present embodiment; Receiver 120 comprises a simulation automatic gain controller (Automatic Gain Control; AAGC) 121, one analog-to-digital converter (Analog-to-digital Converter, ADC) 122, one digital Auto Gain controller (Digital Automatic Gain Control, DAGC) 123 and one food slicer (Slicer) 126.
Equalizer 130 comprises a feed forward equalizer (Feed Forward Equalization, FFE) 124 and one feedback equalizer (Feedback Equalization, FBE) 125.
When receiver 120 receives package P2; Simulation automatic gain controller 121 can be done the gain adjustment to package P2; Then the analog-to-digital converter 122 adjusted conversion of signals that will gain again is a digital signal; And by digital Auto Gain controller 123 gain adjustment back output, feed forward equalizer 124 receives the output of digital Auto Gain controllers 123, and carries out feed forward equalization to handle according to this and produce a feed-forward signal.Food slicer 126 according to feed-forward signal with from the output of feedback equalizer 125, pick out equalizing signal, and supply Physical Coding Sublayer 105 to change.
Wherein, feedback equalizer 125 is based on equalizing signal and carries out feedback equalization and handle and produce its output signal.Among one embodiment, feedforward/feedback equalization is handled and is all multistage computing.
The person of noting; The detecting unit 140 of one embodiment of the invention detects package P1 and P2; Receive parameter with adjustment; Wherein receiving parameter comprises: the parameter of the parameter of the parameter of a simulation automatic gain controller 121, the parameter of an analog-to-digital converter 122, a digital Auto Gain controller 123, the parameter of a food slicer 126, feed forward equalizer 124 and the parameter of feedback equalizer 125 be one of which at least, to keep the connection quality of R-T unit 100 and remote-control device.
Because in the prior art; Owing to the reason that causes packet error is R-T unit 100 and the identical data of remote-control device 11 transmission; For example: R-T unit 100 and remote-control device 11 be not when transmitting data packet, and R-T unit 100 and remote-control device 11 can be exported identical idle sequence (idlesequence), in other words; The package P1 that is transmitted by R-T unit 100 can equate with the package P2 that remote-control device 11 is transmitted in fact, so cause the reception parameter convergence mistake of R-T unit 100.So in the present embodiment, detect package P1 and P2 by detecting unit 140, when confirming that R-T unit 100 and remote-control device 11 arbitrary sides or both sides are all transmitted busy sequence, the reception parameter of R-T unit 100 is carried out synchronous convergence.
Otherwise when if R-T unit 100 all transmits idle sequence with remote-control device 11, then synchronizing function is upgraded (update) for suspending, and wherein, suspends the reception parameter of upgrading the expression convergence and temporarily remains unchanged moving.
In the present embodiment, when R-T unit 100 all transmitted idle sequence with remote-control device 11, the parameter convergence of simulation automatic gain controller 121, digital Auto Gain controller 123, feed forward equalizer 124 and feedback equalizer 125 was for suspending.
Please with reference to Fig. 2, Fig. 2 is the sketch map of a kind of R-T unit 200 of one embodiment of the invention, and R-T unit 200 is that with R-T unit 100 differences R-T unit 200 also comprises a package generator 206, couples detecting unit 140 and Physical Coding Sublayer 105 respectively.Wherein, the equalizer that R-T unit 200 is included can replace owing to other the existing or future balanced component that develops at present.
In the present embodiment; When detecting unit 140 detection package P1 are idle sequence; Detecting unit 140 makes package generator 206 in a Preset Time, produce an index signal to Physical Coding Sublayer 105, makes Physical Coding Sublayer 105 in Preset Time, produce package P3 to delivery unit 110, transmits package P3 by delivery unit 110; Wherein, this package P3 is in order to replace package P1.In the present embodiment, package P3 is the rubbish package.
Because package P1 is replaced by package P3; So the time package that transmitted be busy sequence; Even package P2 is an idle sequence, R-T unit 200 still can continue operate as normal, and synchronizing function need not be suspended renewal; In other words, need not suspend renewal expression R-T unit 200 and still can continue adjustment reception parameter.
In other words; Package P1, P2 that present embodiment can avoid R-T unit 200 and remote-control device 11 to be transmitted are idle sequence simultaneously; So when package P1 was idle sequence, R-T unit 200 utilized package generator 206 in Preset Time, to produce package P3, and replace package P1 with package P3 and transmit; Thus, can avoid R-T unit 200 and remote-control device 11 all to transmit the state of idle sequence.
Then, please with reference to Fig. 3, Fig. 3 is the sketch map of a kind of R-T unit 300 of one embodiment of the invention; R-T unit 300 is that with R-T unit 100 differences detecting unit 340 couples receiving element 111, when detecting package P1 and P2 and be idle sequence; This moment detecting unit 340 according to package P2 calculate signal signal to noise ratio (Signal-to-noise ratio, SNR), in one embodiment; When signal to noise ratio greater than a preset value, detecting unit 340 temporarily stops adjustment and receives parameter.
When R-T unit 300 all transmits identical idle sequence with remote-control device 11; This moment, signal to noise ratio can increase and greater than preset value suddenly; This is because when the signal of both sides output is identical, and (echo) phenomenon that signal caused that echoes of returning that rebounds not is that signal to noise ratio is really improved and improved.
So if signal to noise ratio is greater than preset value at this moment; The detecting unit 340 of R-T unit 300 will temporarily stop adjustment and receive parameter; Recover normally just to continue to upgrade to receive parameter up to signal to noise ratio; So can avoid because when the signal of both sides output is identical, (echo) phenomenon that signal caused that echoes that bounce-back is returned, and make reception parameter convergence mistake.
Please be simultaneously with reference to Fig. 4 A and Fig. 4 B, Fig. 4 A is the sketch map of a kind of R-T unit 400 of one embodiment of the invention, Fig. 4 B is the sketch map of a bit value (seed) generator of one embodiment of the invention.
R-T unit 400 is that with R-T unit 100 differences Physical Coding Sublayer 405 includes a bit value (seed) generator 405a in addition, couples detecting unit 440.Wherein, bit value generator 405a produces a plurality of bit values in the idle sequence.
One embodiment, bit value generator 405a can be a shift register and realizes, and bit value generator 405a comprises that a plurality of register D1~Dn are to produce bit value, shown in Fig. 4 B.
Behind R-T unit 400 lines, receive parameter and all restrain, and package P1 and P2 be under the situation of idle sequence, R-T unit 400 can solve the bit value (seed) of idle sequence package P2, and compares with the bit value of idle sequence package P1.In other words, after this moment, package P2 was sent to Physical Coding Sublayer 405,405a compared according to the content of package P1, bit value that P2 produces by the bit value generator.When bit value among the idle sequence package P1 and bit value among the idle sequence package P2 were closer to each other or identical, then detecting unit 440 temporarily stopped adjustment and receives parameter.When the bit value of the bit value of package P1 and package P2 staggers each other, recover adjustment and should receive parameter.
Illustrate, please with reference to Fig. 4 C and Fig. 4 D, Fig. 4 C and Fig. 4 D are package P1 and the approaching sketch map of P2 among the embodiment; When package P1 and P2 are under the idle sequence situation; In the present embodiment, bit value generator 405a comprises n register D1~Dn and produces bit value, wherein when at time t=k-2; The bit value of package P1 is 11100000, and the bit value of package P2 is 00001111; When at time t=k; The bit value of package P1 is 11110000; The bit value of package P2 is 000111110, then can be considered bit value and the bit value among the idle sequence package P2 among the idle sequence package P1 closer to each other in, then detecting unit 440 temporarily stops adjustment and receives parameter.
On the contrary, please with reference to Fig. 4 E and Fig. 4 F, Fig. 4 E and Fig. 4 F are the sketch map that package P1 and P2 stagger among the embodiment, if when time t=k-2, the bit value of package P1 is 11100000, and the bit value of package P2 is 00001111; When at time t=k; The bit value of package P1 is 11000000; The bit value of package P2 is 00000111, then can be considered bit value and the bit value among the idle sequence package P2 among the idle sequence package P1 for staggering, and then detecting unit 440 continues adjustment and receives parameters.
Detecting unit 440 detects package P2 respectively respectively at k-2 time and k in the time; And solve the bit value of package P2 in k-2 time and k time by bit value generator 405a; Compare with the bit value of the package P1 of k-2 time and k time again, can understand so whether package P1 is near state with the bit value of P2, state or identical staggers.
Please with reference to Fig. 5, Fig. 5 is the sketch map of a kind of R-T unit 500 of one embodiment of the invention, when line is initial; Be in the beginning and end convergence state owing to receive parameter, and this fashion do not learn the starting point of the bit value of package P2, identical just for avoiding package P1 with the starting point of the bit value of P2; Make package produce mistake, cause R-T unit 500 and the remote-control device 11 can't line, compared to previous embodiment; R-T unit 500 also comprises a counter 50; When counter 50 operates in initial line in R-T unit 500, count a gate time, when surpassing a Preset Time as if gate time; Bit value generator 405a changes bit value; In other words, when gate time surpassed Preset Time, shift register 405b selected the starting point of the numerical value of a register Dk as the output bit value randomly in a plurality of register D1~Dn.
Thus, make R-T unit 500 can force to change the bit value of package P1, avoid initial because of avoiding package P1 identical just, and cause the situation that R-T unit 500 and remote-control device 11 always can't line with the bit value of P2 in line.
Please refer to Fig. 6, Fig. 6 is the flow chart of an example operation of parameter regulation means of the present invention, and it comprises the steps:
Step S600: transmit a package P1.
Step S601: receive a package P2, and (for example: the parameter of simulation automatic gain controller, digital Auto Gain controller, food slicer, feed forward equalizer and feedback equalizer) receive at least one reception parameter.
Step S603: whether judge in the Preset Time line.If not, jump to step 604; If jump to step 605.
Step S604: select the starting point of a register, jump to step 605 as the output bit value.
Step S605: detect package P1 and package P2 and receive parameter to adjust these.
Whether step S606: it is identical in fact with P2 to detect package P1.If not, jump to step 607; If jump to step 608.
Step S607: continue adjustment and receive parameter.
Step S608: suspend adjustment and receive parameter.
In sum; R-T unit of the present invention and parameter regulation means are applicable to HDMI (High Definition Multimedia Interface; HDMI) specification, and can avoid the signal of R-T unit and remote-control device transmission identical the time causes packet error and makes the line interrupt situation; In other words; Can solve to transmit with being received in the same group of transmission path and transmit, avoid the situation of packet error to produce, also can prevent terminating in the problem that initial R-T unit of line and remote-control device each other can't lines.

Claims (20)

1. R-T unit comprises:
One delivery unit transmits one first package;
One receiving element receives one second package, and said receiving element receives at least one reception parameter; And
One detecting unit couples said delivery unit and said receiving element, and said first package of said detection and said second package are to adjust said at least one reception parameter;
Wherein, when said detection is identical in fact with said second package to said first package, stop to adjust said at least one reception parameter.
2. R-T unit according to claim 1, wherein, said these receive parameter and comprise:
The parameter of the parameter of the parameter of one simulation automatic gain controller, the parameter of an analog-to-digital converter, a digital Auto Gain controller, the parameter of a food slicer, a feed forward equalizer and the parameter of a feedback equalizer be one of which at least.
3. R-T unit according to claim 1, wherein, when said first package of said detection and said second package were idle sequence, then said detecting unit temporarily stopped to adjust said reception parameter.
4. R-T unit according to claim 1; Also comprise a package generator; When said first package and said second package were idle sequence, said package generator produced one the 3rd package to said delivery unit in a Preset Time, transmit said the 3rd package by said delivery unit; Wherein, said the 3rd package is in order to replace said first package.
5. R-T unit according to claim 4, wherein, said the 3rd package is the rubbish package.
6. R-T unit according to claim 1, wherein, said detecting unit couples said receiving element, and when said first package and said second package were idle sequence, said detecting unit calculated a signal to noise ratio according to said second package.
7. R-T unit according to claim 6, wherein, when said signal to noise ratio greater than a preset value, said detecting unit temporarily stops to adjust said reception parameter.
8. R-T unit according to claim 1; Wherein, said Physical Coding Sublayer also comprises a bit value generator, in order to produce a plurality of bit values in said first package; Wherein, When said first package and said second package are idle sequence, and when a plurality of bit values in said these bit values in said first package and said second package near or when identical, said detecting unit temporarily stops to adjust said reception parameter.
9. R-T unit according to claim 8 wherein, when the bit value of the bit value of said first package and said second package staggers, recovers the said reception parameter of adjustment.
10. R-T unit according to claim 8 also comprises a counter, when said R-T unit operates in initial line, counts, and when surpassing a Preset Time as if said gate time, said bit value generator changes said bit value.
11. R-T unit according to claim 10, wherein, said bit value generator is a shift register, comprises that a plurality of registers are to produce said these bit values; And when said gate time surpassed said Preset Time, said shift register was selected the starting point of a register as the said bit value of output randomly by in said these a plurality of registers.
12. a parameter regulation means comprises:
Transmit one first package;
Receive one second package, and receive at least one reception parameter; And
Detect said first package and said second package to adjust said reception parameter;
Wherein, when detecting said first package when identical in fact, stop to adjust said at least one reception parameter with said second package.
13. parameter regulation means according to claim 12 wherein, when detecting said first package and said second package and be idle sequence, then temporarily stops to adjust said reception parameter.
14. parameter regulation means according to claim 12 wherein, when said first package and said second package are idle sequence, produce one the 3rd package, and transmits said the 3rd package in a Preset Time; Wherein, said the 3rd package is in order to replace said first package.
15. parameter regulation means according to claim 12 wherein, when said first package and said second package are idle sequence, calculates a signal to noise ratio according to said second package.
16. parameter regulation means according to claim 15, when said signal to noise ratio greater than a preset value, said detecting unit temporarily stops to adjust said reception parameter.
17. parameter regulation means according to claim 12 also comprises:
Produce a plurality of bit values in said first package; Wherein, When said first package and said second package are idle sequence, and when a plurality of bit values in said these bit values in said first package and said second package near or when identical, temporarily stop to adjust said reception parameter.
18. parameter regulation means according to claim 17 wherein, when when the bit value of the bit value of said first package and said second package, staggering, recovers the said parameter of adjustment.
19. parameter regulation means according to claim 17 wherein, when operating in initial line, is counted a gate time, if when said gate time surpasses a Preset Time, said bit value generator changes said bit value.
20. parameter regulation means according to claim 19 also comprises:
Produce said these bit values; And
When said gate time surpassed said Preset Time, said shift register was selected the starting point of a register as the said bit value of output randomly by in said these a plurality of registers.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10785069B2 (en) 2018-12-07 2020-09-22 Analog Devices International Unlimited Company Early detection and indication of link loss

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Publication number Priority date Publication date Assignee Title
US20050215211A1 (en) * 2004-03-08 2005-09-29 Christopher Young Method and system for improving dynamic range for communication systems using upstream analog information
CN1977483A (en) * 2004-06-28 2007-06-06 三洋电机株式会社 Transmitting method and apparatus thereof, receiving method and device therof
CN101814934A (en) * 2009-02-20 2010-08-25 瑞昱半导体股份有限公司 Communication device with echo cancellation function and method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050215211A1 (en) * 2004-03-08 2005-09-29 Christopher Young Method and system for improving dynamic range for communication systems using upstream analog information
CN1977483A (en) * 2004-06-28 2007-06-06 三洋电机株式会社 Transmitting method and apparatus thereof, receiving method and device therof
CN101814934A (en) * 2009-02-20 2010-08-25 瑞昱半导体股份有限公司 Communication device with echo cancellation function and method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10785069B2 (en) 2018-12-07 2020-09-22 Analog Devices International Unlimited Company Early detection and indication of link loss

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