RACH Procedure in LTE Explained in Depth | LTE RACH |Preamble| MSG 1 to MSG 5

0:00 [Music] Welcome to our Channel Tech T so today we are going to discuss about the most important topic that is ratch we have already uh uh one video about the tach so it's better that first of all you just go with the topic ratch and I will share the link for that rch also so it will complete your ratch and attach procedure boo so let's start today's topic rash procedure in L so first of

0:47 all we need to understand what exactly ratches and along with that there are lot of points we're going to discuss related to the ratch first of of all what exactly ratch so ratch basically stand for your Random Access Channel procedure okay and now the question come that why ratch is required so already we have seen like whenever we have switch on the UV okay so all the synchronization that has been done PSS SSS me S

1:33 all synchronizing the DL direction we have U has already performed so this is the first signal that is going to be synchronized in the uping direction so now we can justify the word that why ratch required so going forward we are having the other questions also that why ratch when ratch is going to happen on what which particular occasion then types of

2:21 rch and going forward we will see uh the other topics related to this about preamble Preamble format how this Preamble is generated when and where exactly we are going to transmit this ratch uh uh and this Preamble so lot of question we will be having and we'll go sequence by sequence so the first thing that y ratch required basically there are two most important reason that why exactly ratch is going to require so you can see why ratch is

3:08 required so first thing is to achieve the Uplink synchronization between the UV and the eodb this is one of the important thing that the U must be uh synchronized in uping Direction so for that one particular reason and we need to obtain the you need to obtain the resources that you are going to send for the RC connection request so basically for masses 3 that is rrc connection request so for this particular purpose to obtain the resources for that you are we are going

3:53 to have the ratch procedure so these are the two most important reason that why exactly we are going to have the ratch now the question you have already seen mean so sorry this was for the why exactly the ratch is required now the next thing that when exactly this R procedure is going to uh be used or when exactly it's going to occur when exactly uh it will come into the picture so already we are seeing that whenever we will make the UV on so for the initial you can say acquisition or initial access purpose we are going to uh have this ratch

4:40 procedure and we are going to perform the ratch at the time of Handover okay so we'll see the different type of ratch also so for the Handover we are going to have the ratch procedure that is contention free CF here initial access it will be contention based we will understand what is contention free and contention based okay so basically if you'll see when the ratch is going to happen ratch is going to uh take place at the time of initial acquisition or initial access at the time of Handover we are going to perform this ratch at the time of radio link

5:26 failure so we are already having one video uh related to RF I will share that link also so so at the time of radiol Link failure where you can see the case of rrc connection reestablishment will come into the picture so at that particular time ratch is going to be so to recover from that okay so rch is going to be performed so these are the important areas these are the important aspect where exactly the ratch is going to happen now the question come that okay what are the type of ratch so when we talk about the type of ratch so basically it is defined into contention B based R procedure and

6:12 contention free ratch procedure contention free or non contention uh based R procedure you can call it so what exactly the word contention itself see try to understand the word contention contention word means already it's a kind of tension or it's a kind of argumented thing in between two or multiple entities okay so if it is contention based rat procedure so definitely let's suppose this is our eode B so definitely multiple U are trying to perform the ratch okay trying to do the Uplink synchronization

6:59 okay so for that particular purpose so he where there is a argument or there is always a class while sending the Preamble while sending the message one okay so that's the reason we are considering this as a contention best where there is always argumented let suppose multiple us are trying at the same time notot not all the U are going to get the access for that okay so now the question come that okay that is contention with then what exactly the contention free okay and when exactly you're going to have the contention free contention based rest procedure at the time of

7:44 initial acquisition or access we can go with this contention Bas because if it is not in one attempt it is not if it is not going to send the Preamble it will try for the second ATM there is no any issue for that okay and when exactly we are going to have the contention free so if we are talking about the contention free at the time of Handover which is already our U is attached and is doing the Handover at that time we can't play with this kind of situation that okay multiple U are going to have that particular argumented thing and where already one U is already attached and going to perform the Handover and the

8:30 two is going to fight okay so here among the Preamble so there are 64 preambles okay so dedicated preambles are provided by the enode B at for the Handover purpose so at that particular time you we don't need to bother about or bother about or there are uh there is no any such kind of uh fight or contention between the multiple U so there's already dedicated pble it will pick and it will try to perform the Handover so this is one of the you can say the major difference that is in between the CBR and

9:17 CF and whenever we are talking about the rat procedure so in last slide I I am I will be going through the C2 related parameters so C2 basically contains importantly ratch related parameters so we will see there are multiple ratch related parameters where your Preamble information will be there where how many number of AR preambles it has selected for among the 64 power ramping parameters are there Preble initial Target received uh uh initial receip Target power is there Preble trans Max ra response window

10:02 sides Max har message 3 R transmission so lot of uh uh information elements are there which is in CP 2 where basically we'll focus focusing about P configuration also okay in that per configuration we will be having important eyes like root sequence index per configuration index high speed flag all the that particular eyes we will go through one by one so now we are able to understand that what is ratch why ratch required when ratch is required how many types of ratch procedures are there so these are the points that we

10:49 have covered now one of the important thing that we are discussing about preambles so we are discussing that okay there are 64 preambles okay which is going to be uh used in the LT so first of all try to understand that what exactly you understand by the [Music] Preamble okay so this is one of the important question that comes in mind that what exactly uh Preamble means so Preamble you can consider a unique signature also okay that there are 64 unique signature

11:36 which your UV is going to pick and try to send to the inote B as a message one okay or you can say this it will start uh synchronizing in the opening Direction by choosing that Preamble okay so if if you we can go with that particular example also so first of all try to understand there are 64 preambles being used as for the 3gpp in the LT okay so uh Preble is a kind of signature or if I'll take one example let's suppose of there is a door or somebody has given a party okay and there is a door okay

12:25 and he defined 64 kind of knocking pattern okay and he invited let's suppose 200 300 people and he already designated that okay there are 64 pattern which has been defined so whoever will be coming use any of the 64 knocking pattern let's suppose single knocking double knocking three times knocking two times knocking then wait and then two time likewise 64 knocking patterns let's suppose somebody has defined or entering into the party okay the people are coming that you can call it as person one person 2 person 3 or you can consider it as a uv1 uv2 uv3 all are coming and knocking let's suppose it

13:12 has chosen double knock it has chosen triple knock it it has chosen same double knock also because there are 64 it has defined okay so who multiple people can use the same knocking pattern also because that is valid which is defined by the organizer this is what exactly there are 64 preambles in a LT which can be used by the UV so U can pick any of the Preamble and it can send message one okay that we will discuss later so this is what in general Preamble definition is and what exactly Preamble look like what exactly the structure of the Preamble so you can

14:00 see Preamble consist of C B that is cyclic prefix plus sequence so if I'm telling about cyclic prefix so the the cyclic prefix the understanding of the cyclic prefix and why exactly it is going to be used cyclic prefix basically going to be used to medicate the inter symbol interference this is one of the major reason that we are using the cyclic prefix along with the sequence so this is so this is the structure of on [Music] Preamble so you can see the length can

14:48 be designated at TCP and T sequence TCP is the length for the CP and T sequence is a sequence length so if you will add this it is one p t T CP plus T sequence is the length of one Preamble okay now the question come in this particular [Music] uh context that what exactly you have or what exactly the significance of t uh this capital t s you can see here it is TS that we will disc discuss so

15:33 first of all the length of the cylic prefix plus T sequence will going to give you Preamble length so let's see there are four type of Preamble format in FDD okay and Preamble format 4 is for tdd so you can see Preamble format zero Preamble format 1 Preamble format 2 Preble format three and four so CP we have already mentioned cylic prefix okay which can act like a guard in tural to prevent isi okay inter symbol interference and then we are having the Preamble sequence so Preble sequence we can call it as a key component for the

16:19 rat message okay so what you can see it is specifically designed sequence used for the uh UV identification and for the timing alignment this particular sequence okay and there is one more term that is going to be used I we will see in the calculation guard time and why exactly guard time always added at the end of the Preamble okay there are multiple preambles at the end of the Preamble so that it should not overlap okay between let's suppose multiple transmission is happening from the different different U it should not overlap that should not be confusing that's the reason we are adding uh guard time okay so there are I have

17:08 already mentioned that you can see here there are four Preamble format 0 1 2 and 3 and based on that the length will change so you can see for Preble format zero what exactly the TCP line 316 set. TS okay and T sequence length 2 4576 dots so this is if you will add it it will give you one complete Preble length when you are going to use a preamble format zero one more important uh you can say uh aspect will come into the

17:53 picture that why exactly uh we are going with PML format zero generally in our regular deployment model okay there we are having multiple then why exactly requirement of multiple Preble format so that answer we can get it from this particular calculation okay and try to understand what exactly TS is so TS generally refers your what you can say the basic time unit okay so basic time unit if you'll go with uh formula I'm not going much more dep but if you go with formula it will be um this particular

18:43 seconds okay so you can call it it is the smallest time unit which is going to be used in the LT okay and uh if will go a little bit more so that is basically derived from the sampling rate and what exactly the sampling rate we are taking to derive this that is uh 30.7 to mahz this is the sampling rate if you're going to use in 20 MHz of the system bandwidth so this is what exactly the smallest unit of time being used that is one by this much of second now if we are going to calculate

19:29 if you're are going to use the Preamble format zero so what should be the radius of from where exactly UI can pick the Preamble and can send okay so this is what exactly Preamble format is going to Define so the maximum radius you will calculate so you can see the Preble format zero it is having the TCP length 3168 if and if you're going to convert from this uh Ts that is the smallest unit in Ms in millisecond you're going to get 103 millisecond likewise if you'll convert this T sequence into millisecond

20:15 it will 80 so the total length you know like TCP plus T sequence is your length of that Preamble so it is coming around 903 that is nothing which will be approx we can consider as a one or one in a standard we can consider 1 millisecond if you consider in a frame oframe so it will be one subframe okay and the guard time that we are going to add 097 so that it should not while doing the transmission it should not interfere with the other and while calculating the radius so it will

21:03 come around 14 kilom from 14 km maximum the UI can pick and can s the pr so that is reasonable okay that is the maximum so we in LT we are having the enode BS at the distance of 1 kilm 1.5 500 M so maximum let's suppose if the other inod are not there down so you can pick Preble maximum from the 14 kilm okay and see if you go with the other Preble format it is 75 km 28 or not which is practically in normal scenario it's not required that your UV should Peak the Preamble from 75 km or 28 km then why exactly this Preamble formats are being used it is being used in such area like

21:51 suppose in hug forest or in a mountain area where there is a huge interference there basically we are going to use this PR format to medicate to medicate the interference in that particular area and let's suppose the E not B distance is too much high and too much uh more okay then we are going to use for but in general scenario generally we are going with the format zero so this is what exactly about the Preamble format and what exactly the Preamble is going to the the next topic that we understood what exactly Preamble is okay

22:38 now the question come that fine we have understood that there are 64 preambles and the Preamble format now the question come that okay when and where exactly are going to send this or we we are going to transmit this ratch okay so as per this 3gpp table this is [Music] from this is from one of the 3gpp uh table to understand about when and where exactly you are going to send the your P okay so now try to understand in a very simple manner like the E note

23:25 B okay reserves a specific resource block also for p okay so there there are two important configuration that from the S 2 I will show you that what are the eyes that we are going to do so one of the I that we are going to select is that P configuration index okay and one more important parameter that is p frequency offset so we will understand about these two things which will give you the answer about when and where exactly does a UV transmit the ratch okay so there are 64

24:11 P configuration index which has been defined as per 3gpp you can see from 0 to 63 and we will take one example to understand that how exactly you can read this okay let's suppose if if it is configured with P configuration index IND 2 so if your inod is configured with P config index 2 it means that your U going to use a preamble format zero and it can send it can select for sending that Preamble okay to transmit that

24:58 rash any system frame number so when whenever we are telling about system frame number there are one 24 system frame number so it can choose even one okay like it can go with 2 4 6 8 and so on okay so we know that P config index 2 Preamble format zero it going to choose it will choose a system frame number any even one and let's suppose it has chosen six in that six let's suppose so it is like it is only the radio frame number sfn okay in that particular radio frame seven subframe let's suppose 0 1 2 3

25:48 4 5 six 7th so seventh subframe is going to use for the transmission of that particular PRL okay that particular rat the where exactly you're going to transmit so this is particular location okay so this is what exactly P configuration index significance if you check this one Preble form uh P config index 5 it means it is going to use zero Preble format it can go with any sfn from 10 to4 and go with seven subframe number okay this is how exactly you want to read this now there's other

26:34 important Uh I that P frequency offset so P one of the important thing that is p frequency offset so P frequency offset basically it will give the location in the frequency domain and let's suppose if we'll take the example five or let's take the example s so what exactly that means it is telling that the transmission occupy the resource block from 7 okay it is going to start from RB

27:21 number 7 and it will go till the number where exactly your six prb going to complete like 7 8 9 10 11 12 okay so likewise it is going to go up to that particular number where six prb is going to be covered so this is this is this is will be giving you the starting point of the RB number from where exactly it is going to be counted okay [Music] now now it's very important to

28:06 understand that okay we understood there are 64 P Preble okay now the question come that how exactly that 64 P Preble generated and this is this is this is very what you can say very important aspect to understand and I have already mentioned you about so there if you are talking about there's one of the important thing that we need to discuss is root sequence index period config index we have already discussed and period frequency offset already discussed we are going to discuss about root sequence index high

28:52 speed flag and zero correlation June which is going to help in generating 64 PR Preble sequence okay and I will go with the technical definition and I will take the example also that how exactly we can Define this three definitions okay so if we talking about the root sequence index okay so you can see the root sequence index so here it is 100 I will take the example and try to understand this significance also but try to understand what exactly root sequence index is telling us and what is the

29:37 definitions if you have if we'll go with the definition root sequence index indicates that which specific jf2 sequence the cell uses the first okay so for uh Rat procedure okay so we are having uh 839 J of2 sequence from 839 64 Preamble is going to be generated okay so what exactly your root sequence index is giving root sequence index is telling that which specific jf2 sequence the

30:23 cell going to use first so you can say the starting point okay and the mobile device then create as many as cyclic shift from that particular sequence okay to generate the 64 Preamble now we will try to understand I will take one example also to let you understand about this try to understand what is zero correlation Zone role in this so what zero correlation Jone is you can say one of the setting that is going to control that how many cyclic sift a mobile is

31:08 going to or your UI is going to create from one J of two sequence okay so if you if you if if you going to check if you going to take one of the example or to understand what exactly this means so root sequence index you can consider the base sequence okay or if you'll take an example also like uh root sequence index is nothing but our alphabet there are 26 alphabets okay so it is like alphabet and all preambles 64 primble that we are

31:58 talking about that are words the 64 Preamble there's nothing but these are the words which are generated or made from these particular alphabets now the question come how so or you can say the root sequence index what exactly it is giving the starting point let's suppose if I'm taking the 100 100 we have said so it is going to tell this is the starting point from where exactly you're going to generate the sequence okay and if you're are talking about the zero correlation Zone confy okay so zero correlation Zone it's going to define the cyclic shift between the multiple shift I have told you that

32:44 this is the starting point from where exactly multiple sequence is going to be generated and how that sequence is going to be generated so the root [Music] sequence basically divided into small small chunks okay that we call it as a cyclic shift small small with the small small sift it is going to generate the unique sequence okay so each cyclic sift or chunk that we are talking about okay uh that is that creates a different version of sequence multiple sequence okay so what exactly zero correlation Zone config is giving you zero correlation Zone config

33:32 defines the cyclic shift between the sequence okay or you can say the step size okay let's suppose this is one sequence generated so the second sequence generated after this particular step site this is what exactly your zero correlation Zone confy in a very simple manner you can understand in okay now what is highs speeed flag so highp speeed flag going to give you the understanding let's suppose if your UI is moving slow or fast so that it can identify

34:18 between the cyclic shift okay so whenever it is going to be slow then we need to choose different uh we need to choose different uh zero correlation uh Jone config set that cyclic shift NCS we'll discuss on that okay so if if we are going with the slow moving object okay then we need to go with unrestricted set if we going with the fast moving then we need to go with the I I will go with the calculation let me first of all understand this I believe that this particular part is clear to you that how exactly it is

35:03 going to be what exactly the significance of this and now we will understand with the [Music] example so here root sequence index is 100 it means this particular is the starting point from where exactly it will start doing the cyclic shift and it will keep doing the cyclic shift till your 64 Preamble generated okay and what exactly the cyclic shift uh what you can say the duration or the size step size that is nothing but your zero correlation Zone config okay now try to

35:50 understand that with the example that how exactly it is mapped sorry how exactly it is mapped or how exactly we are going to Define the root sequence so this is the 3gpp table okay so this 3gp table has put that physical root sequence that is denoted by mu okay this that is these are the values 8392 sequence so they are in they are put based on the 3G PP they are put it in a small small bucket you can see which is defined by the 3G PP so

36:37 that it will be easy for the configuration purpose and to be understood by the UV or the system very easily so logical root sequence we have given as per the 3gpp it has given like 0 to 23 we are going to use this physical root sequence within this bag we are going to use this likewise bag has been defined so if I'm going to take the example with a so what was the example what was the root sequence index that is 100 if the root sequence is 100 what is the value of mu then so you will see the bag so it is coming under this

37:24 bag okay you can see this is 90 91 92 93 94 95 96 98 99 100 so 636 is your mu value that is the physical root sequence and that is going to be used by uh the system further for uh in calculation so we are having this mu value as a 636 because we are having the root sequence me this particular sequence will be

38:12 used as a starting point to derive that 64 prle now what is the value of zero correlation Zone config 12 so if you will going to see this zero correlation Jo config 12 and what is high speed flag high speed flag value is false false is basically used for slow moving UV and let's suppose that enod b is near the railway track or highway there highs speeed flag settings we need to make it as a [Music]

38:58 true so that the slow moving u's it mean fast moving U and slow moving UV will not get confused so if the value is false it is means it means that it is a slow moving uh UV okay so for that particular purpose it is going to use NCS as this one the false one okay if it is true then it is going to use 158 so what 119 what exactly it is telling 119 is telling that this NC that is a cyclic

39:44 interval okay it is telling now you can get 64 different period sequence okay considering this as a base sequence which you need to base sequence we have already got it okay the base sequence and we will do the cyclic shft to get the first sequence the second sequence as by doing the cyclic shift of the base sequence by 1 into 19 samples likewise the third sequence fourth sequence till 31 we are going to we get it by this particular calculation by 119 sample which we got

40:29 it from here it will keep doing the cyclic shft and keep generating that 64 Preble so this is how exactly your Preamble is generated now the question come that okay we have understood about one more fundamental that the period signal is structure okay and why exactly 6 prb is going to required so for this particular you can understand for the General radio frame if you are going the one subframe is of 15 khz and in 6 prbs if you are going to check

41:15 so 12 sub carriers are there in 1 prb it sub carrier is of 15 KZ if you're going with the 6 prvs then 72 subcarriers and it is going to utilize 1 08 mahz likewise for the PCH one subcarrier is considered as 1.25 khz and as we are having 839 J sequence so 839 subcarriers going to use for that and if you'll go with the proper calculation to understand this so Preble is I've already told that Preble is made up of 839 J of2 sequence so if we are

42:02 talking about the one Preamble so one Preamble 839 sequence so if we are telling and what is exactly the subar spacing or we can call it as the frequency 1.25 Kilz so total occupied frequency if we are if we going to calculate it will come around 839 into 1.25 khz which will be nearly about 1

42:49 048 mahz and which we call it as near about standard if you'll go 1.4 mahz so 1.4 MHz will as for this spec so it is going to occupy 6 PB as for the table 1.4 MHz that's the reason we are considering that for p to be S they are going to occupy 6 prbs okay and if we are going to see how many in a Time domain so T is 1 by f on you can see 1 by 1.25 khz that is f so it will be nearly

43:40 8 millisec which we can so consider 1 millisecond so this is what exactly in time and frequency demand it is going to be calculated now we have understood till now we are we are understanding about that what exactly ratch is why ratch when exactly ratch is going to perform type of ratch what is the preamble format and what is Preamble and then we are going to see when exactly when and where exactly you are going to transmit that ratch then how exactly that 64 Preble got generated so this is we have understood

44:27 now when we are talking about the r procedure the first message that is going to be sent so from here basically your complete procedure is going to start for the ratch so what exactly whenever you will be uh going to perform the ratch so message one that is going to be sent by the UI or in a very simple manner you can call it like U will send the P preamble correct or rat Preamble it will select okay that will be carrying r r

45:14 NTI okay and that R RN will further will be decoded by the your [Music] eodb so this is the first message or we can call it a message one which is going to be sent from the US U side U2 inor now we have heard about the term R RTI so R RN what exactly it is saying the r is associated with the p ratch okay uh in which uh the ratch Preamble is transmitted okay that is what exactly R is if you go with the formula r r NTI that is 1 + t

45:59 + 10 into FID so generally FID for FDD it is going to be [Music] zero so if it is zero then 1 + T it is for the tdd okay so and what exactly the value for the T ID if you if we talking about the T ID T ID range is from 0 to in between 0 to 10 okay in a Time domain in a sub within the subf frame and if you are talking

46:48 about FID it will be from 0 to 6 that in a frequency domain this is how exactly your R so let's suppose if you will be zero okay then 1+ T ID will be your R NTI so message one are if you are going to if you have already sent the Preamble and it is decoded by received by the enod B then un is going to send the response that we call it as a random access response in message two so what exactly unb is doing unb sends that rat response with the r Niti which it has already

47:34 calculated from the Preamble okay and along with this message through lot of information it is going to send okay like frequency allocation and it is going to give the information about RB assignment MCS configuration and it is going to inform about that RSC connection request to U for the MS 3 so an Uplink Grant okay all this is going to be sent by message to along with TC r& TI once it sends a message to U we going

48:19 to send message three and that we call it as rrc connection request and at that particular time your timer T300 is going to start so this is your rrc connection request message which is going to be sent by UI to the e b and what exactly it consist of it will be consisting of UV identity random value because we can't use the MC directly so that's the random value we are going to use and establishment cause why exactly you are going you are sending the RS connection request Mass 3 why so it can

49:05 beo signaling it can be emergency anything okay defined by the 3gpp so this is what exactly your masses 3 is whenever we are talking about message 4 So based on that your en notb is going to send rrc connection setup message and here exactly contention resolution done what exactly contention resolution let's suppose multiple let's suppose two U are trying A and B both pick same Preamble and send it okay possibilities are there and it

49:50 is decoded by the in B both get the same R Random Access response because inod is not able to identify between them and let's suppose that both send RC connection request at the same time so e not B get confused and it will accept that and to distinguish between them okay that which exactly going to get the RC connection set up because here already lot of argument is there in between the two U that contention will resolve at message 4 based on the TA which is culated at message 2 by the eode B so that's the reason message 4 is the

50:37 message where exactly conten resolved and one of the you know will get that what one of the U will get that successful and which is not going to get successful they will again send the r connection request this is how exactly it happen once RC connection setup message send then enodeb is going to send you is going to send rrc connection setup complete message along with nas or we can call it attach request Plus esm or PDN

51:26 connectivity request this is your message five also whenever we are talking about the message five in message five there are few important thing that we need to that we must need to consider that RC connection setup what exactly it will be having it will be having the details of plmn [Music] identity plmn identity then what is registered mme and that dedicated Nas info that basically having

52:16 the attach request and all so and what exactly registered mme that we are talking about it will be consisting of plmn ID mme group ID mme code so this complete information finally it is going to send you is going to send in message 5 to the ENB and then it will go further for the authentication process and encryption that video is already there with us so I will share the link on that and see we will discuss one or two minutes on this that there are two

53:01 parameters that is nothing but the ratch related parameters you can see number of RA preambles so there are 64 preambles which is from among that 64 how many preambles are going to be chosen for this contention free a contention based okay let's suppose in 64 let's suppose 40 it has selected then 24 will be reserved by the Ino B for the dedicated one so this is going to give you the number of R [Music] preambles okay and you can see the information about let's suppose you is trying to send and not able to send that particular message one from

53:46 particular signal strength then we are going to use the power ramping parameter where it is ramp it by either 0 DB 2 DB 4 DB 6 DB so generally 2db deployment is done like it will ramp it by 2 DB or 3 4 DB okay let's suppose -108 is your signal s so not able to send that Preble then it will ramp it by 2 DB okay improved one again it is not going to send improve it by 2 DB okay so it is improving so now the question come that how much how much time so Preble transmax okay so you can configure let's suppose

54:32 generally 10 or eight people used to configure like after eight transmission again it will restart the transmission fresh from freshly okay then ra response window size it is basically in the uh milliseconds okay so like when it is going to response r that window size is like 10 millisecond 8 millisecond within that it should send the response Mac contention resolution timer okay that should happen within this particular Frame Window okay and further we are having the P configuration so P configuration you can see the root

55:17 sequence index we have already discussed P configuration index high speed flag zero correlation Zone period frequency option this all we have discussed so refer the a video to understand the complete rash procedure and hope you must have understood this ratch if any doubt please do comment we we will be happy to assist you in that so thanks everyone for watching this complete video please go through our YouTube channel go through our LinkedIn page go through our website you can join our Telegram for the further information of any technique and please

56:03 do also comment that which particular next video you want to you want us to proceed with thank you thanks everyone [Music]