Question paper code: D2286 B.E/B.Tech Degree Examination APR! /"A# 2$%$ Eighth &emester 'omputer &cience and Engineering T%($2)"*B!E T%($2)"*B !E '*"P+T,Reguation 2$$(0 Ans1er a uestions Part )A%$3242$0"ar5s % hat is spreading 7actor 2.hat is poing 9.Distinguish et1een so7t hando;er< hard =and o;er. (.De7ine 7oot print 1ith respect to sateite s>stems. ?.&tate the 9 phases o7 the medium access o7 di77erent competing nodes. 6.1hat are the po1er sa;ing mechanisms in uetooth @.hat are the dra1ac5 dra1ac5s s o7 1ired net1or5s 8.De7ine D>namic &ource Routing. .hat is the di77erence et1een T'P < +DP. %$. "ention an> 2 saient 7eatures o7 AP AP.. Part)B ?3%648$0"ar5s %% a0 i Discuss in detai aout the t>pes o7 antennas 1ith their radiation patterns.%20 ii Expain Di;ersit> techniues.(0 orC %% 0 Expain space reuenc>code reuenc>code < Time di;ision "utipexing in detai.%60 %2 a0 Descrie Digita Audio Broadcasting.%60 orC 0 Expain routing ocaiFation and hando;er in sateite s>stems.%60 %9 a0 Descrie architecture o7 B!+E T**T=.%60 orC 0Expain 'hanne contro su a>er in =PER!A,.%60 %( a0 Expain optimiFation in "oie P in detai.%60 orC 0Expain PG6 Protoco in detai.%60 %? a0 Discuss the roe o7 in support 7or 7 or moiit>.%60 moiit>.%60 orC 0 Expain the 7oo1ing: i0 ndirect T'P. 60 ii0&nooping T'P.60 iii0Expain aout per7ormance enhancing proxies.(0
B.E./B.Tech. DE-REE EHA",AT*, ,*GE"BER/DE'E"BER 2$$. &e;enth &emester n7ormation Technoog> T%($2) "*B!E '*"P+T,Reguation 2$$(0 Time: Three hours "aximum:%$$ mar5s Ans1er A!! uestions. PART A) %$ H 24 2$ "ar5s0 %. h> do =idden and Exposed termina proems arise 2. Di77erentiate Broadcast 7rom "uticast. 9. Detai the 7eatures o7 "&AT. (. =o1 can an e77icient routing e made in sateite s>stes ?. hen are tuning 7reuenc> and 7reuenc> considered 6. =o1 can >ou utiiFe moie antennas e77icient> @. 'ompare ;arious moduation techniues. 8. hen itIs reuired to go 7 or -"&J -&J and DQP&J . n 1hat 7unctionaities &1itches di77er 7rom Routers %$. =o1 and 1h> does )T'P isoate proems on the 1ireess in5 PART B ) ? H %6 4 8$ "ar5s0 %%. a0 'onsider three users and Bar5er code o7 six its each 7or the users transmitting the signas introduce noise and near/7ar proem 1hie transmitting and reconstruct the data in the recei;ing side pro;iding the proper countermeasures 7or the compications. ,ote: +se 'D"A technoogies0 "ar5s %60 *r0 0 i0 Tae the 7reuenc> ands useed 7or 1ireess appications 1ith their ranges propagation modes and appications. "ar5s 60 ii0 Represent diagrammatica> the protoco machines 7or mutipe access 1ith coision a;oidance. "ar5s %$0 %2. a0 i0 &5etch the data net1or5 in >our campus. =o1 man> hosts are there and ho1 arge is the user popuation hat is the speed o7 the access in5 to the nternet =o1 so >ou gain access to the nternet =o1 much does home access to the nternet costs "ar5s %$0 ii0 h> are so man> di77erent identi7iers/addresses e.g. "&&D, T"& "&0 needed in -&" -i;e reasons and distinguish et1een user) reated and s>stem reated identi7iers. "ar5s 60 *r0 0 i0 'onsider a moie user 1ho is migrating 7rom a pace to another pace pro;ide him a seamess ser;ice > sateite s>stem aso s5etch the architecture. "ar5s 80
ii0 Discuss the importance o7 DE'T Protoco !a>ers. "ar5s 80 %9. a0 i0 Detai the time) ounded ser;ice on top o7 the standard D' mechanism 1here ad hoc net1or5s cannot use the 7unction. "ar5s 80 ii0 Discuss the P=# 7rame 7ormat o7 an EEE 8$2.%% using the spread spectrum techniue 1hich separates > code. "ar5s 80 *r0 0 i0 The channe access contro sua>er o7 =PER!A, o77ers a connectioness data trans7er ser;ice to the higher "A' a>er. Kusti7> the ao;e statement 1ith reated re7erences. "ar5s %$0 ii0 Discuss the 7unctionaities and support pro;ided > !2'AP. "ar5s 60 %(. a0 Discuss and detai the di77erences in topoog> reorganiFation in D&DG and D&R routing protocos. "ar5s %60 *r0 0 i0 hat are the genera proems o7 moie P regarding securit> and support o7 uait> o7 ser;ice "ar5s 80 ii0 ,ame the ine77iciencies o7 moie P regarding data 7or1arding 7rom a correspondent node to a moie node. hat are optimiFations and 1hat additiona proems do the> cause "ar5s 80 %?. a0 hat are the maLor di77erence et1een AP 2.$ and AP %.x hat in7uenced the AP 2.$ de;eopment "ar5s %60 *r0 0 Detai aout +T"& Radio nter7aces in reuenc> Di;ision Dupex and Time Di;ision Dupex modes. "ar5s %60
"A# /K+,E 2$$ "*B!E '*"P+T,-. Eecti;e Part MA %. De7ine near /7ar e77ect 2. -i;e an> t1o appication o7 sateite s>stems 9. hat are ad)hoc net1or5s (. De7ine hando;er in AT" ?. hat is meant > Registration i7etime o7 a pac5et 6. hat is meant > tunneing @. =o1 does the standard T'P eha;e 1hen a pac5et is ost during transmission 8. De7ine time M out 7reeFing . "ention the roe o7 transaction a>er in AP %$. "ention an> t1o messages o7 '"P
Part MB %%. a0Expain in detai: i0DE'T s>stem. "ar5 8C ii0TETRA s>stem. "ar5 8C *r 0 i0 Discuss !E*"E* and -E* sateite s>stems. "ar5 8C ii0 Discuss Digita Gideo Broadcasting. "ar5 8C %2. a 0Expain in detai: i0=PER!A, "ar5 8C ii0 B!+ET**T= "ar5 8C *r 0 hat is meant > AT" Descrie AT" re7erence mode ocation management ser;ices and Q*&. "ar5 %6C %9.a0 i0 Discuss the purpose and appication o7 D='P. "ar5 8C ii0 Expain agent disco;er> and registration. "ar5 8C *r 0 Expain the ;arious routing strategies in moie ad)hoc net1or5s %(. a0 Expain an> ( cassica T'P impro;ement techniues. "ar5 %6C *r 0 i0Discuss Transaction oriented T'P in detai. "ar5 8C ii0 Discuss T'P o;er 2.?/9- 1ireess net1or5s. "ar5 8C %?.a0 Discuss the component o7 AP arch/) and its appication en;ironment. "ar5 %6C *r 0i0rite short notes on "! script. "ar5 8C ii0 Discuss TA "ar5 8C
B.E. / B.Tech DE-REE EHA",AT*, ,*GE"BER/DE'E"BER 2$$8 &e;enth &emester n7ormation Technoog> T%($2 M "*B!E '*"P+T,Reguation 2$$(0 Time: Three hours "aximum: %$$ mar5s Ans1er A!! uestions. PART A M %$ x 242$ mar5s0 %. Di77erentiate anaog moduation and digita moduation. 2. =o1 are guard spaces reaiFed et1een users in 'D"A 9. hat are the genera proems o7 sateite signas tra;eing 7rom a sateite to recei;er (. Di77erentiate s>mmetrica and as>mmetrica communication s>stem. ?. hat is =PER!A, 6. =o1 is moiit> restricted using !A,& @. hat coud e uic5 NsoutionsO and 1h> donOt the> 1or5 8. hat ad;antages does the use o7 PG 6 o77er 7or moiit> . rite the ad;antages and disad;antages o7 moie T'P. %$. De7ine 7ast retransmit. PART B M ? x %6 4 8$ mar5s0 %%. a0 Expain in detai aout mutipexing. *r 0 Expain the 7oo1ing : i0 "A' ii0 &D"A. %2. a0 Expain the 7 unctiona architecture o7 a -&" s>stem. *r 0 Discuss aout digita ;ideo roadcasting. %9. a0 Expain the concept o7 ue tooth architecture. *r 0 Expain the concept o7 EEE 8$2.%% medium access contro a>er. %(. a0 Expain the 7oo1ing : i0 D&DG "ar5s 8C ii0 Ad)hoc D&R. "ar5s 8C *r 0 Discuss aout tunneing and encapsuation mechanism and re;erse tunneing. %?. a0 Expain and detai aout traditiona T'P. *r 0 i0 Brie7> expain aout indirect and snooping T'P. "ar5s 8C
ii0 Brie7> discuss aout AP."ar5s 8C B.E/B.Tech. Degree Examination Apri/"a> 2$$8 Eighth &emester Reguation 2$$(0 'omputer &cience and Engineering T %($2) "oie 'omputing Part)A%$3242$ mar5s0 %. Assume a recei;er is ocated %$ 5m 7rom a %?$ transmitter. The carrier 7reuenc> is 6 -=F and 7ree space propagation is assumed -ain at transmitter is % dB and -ain a t recei;er is % dB. a0 'acuate the transmit po1er in dB. 0 ind the po1er at the recei;er in atts. 2. hat imits the numer o7 simutaneous users in a TD"/D" s>stem compared to a 'D" s>stem hat happens to the transmission uait> o7 connections i7 the oad gets higher on the ce 9. 'onsider the hando77 procedure in -&" s>stem that is ased on reati;e signa strength 1ith threshod that is a moie s1itches 7rom one ce to another i7 a0 the signa at the current B& is su77icient> 1ea5 ess than a prede7ined threshod0 and 0 the other signa is stronger than the t1o. hat are the dra1ac5s o7 this scheme 1hen the threshod is too o1 or too high (. &tate the di77erent t>pes o7 transport modes and channes used to carr> pac5ets in Digita Audio Broadcasting. ?. n the Distriuted 'oordination unctionD'0 protoco o7 EEE 8$2.%% 1h> does a ,ode 1ait on> && time units a7ter the ast data pac5et reception0 e7ore sending an A'J 1hie 1aiting D& time units e7ore attempting a data transmission 6. hat are the ad;antages and proems o7 7or1arding mechanisms in Buetooth net1or5s regarding securit> and po1er sa;ing @. =o1 can D='P e used 7or moiit> and support o7 "oie P 8. hat are the di77erences et1een A*DG and the standard distance ;ector agorithm h> are extensions needed . =o1 and 1h> does )T'P isoate proems on the 1ireess in5 hat are the main dra1ac5s o7 this soution %$."ention t1o AP ser;ice pro;iders. ind t1o ce phones supporting AP and identi7> 1hich AP ;ersion the> support.
Part)B?3%648$ mar5s0 %%. a0 =o1 does 7reuenc> reuse enhance ceuar net1or5 capacit> Besides the numer o7 users 1hat other maLor 7 actor in7uences the decision on custer siFe A ceuar s>stem uses 7reuenc> spectrum %8$$ "=F to %8($ "=F 7or upin5 channes and %86$ "=F to %$$ "=F 7or do1nin5
channes respecti;e>. Each channe ta5es 2$$ J=F and can e shared > 8 users. Each user needs one upin5 and one do1nin5 channe. =o1 man> users can e supported 1ithout 7reuenc> reuse in this ceuar s>stem %6C *R0 0 hat is the use o7 spread spectrum &5etch the oc5 diagram o7 the Transmitter and Recei;er o7 D&&&. Expain 1hat each oc5 does and 1hat the signa oo5s i5e in time and/or 7reuenc> domains0 at each ocation in the oc5 diagram 1ith an exampe.%6C
%2. a0 ,ame the main eements o7 -&" s>stem architecture and descrie their 7unctions. hat are the ad;antages o7 speci7>ing not on> the radio inter7ace ut aso the interna inter7aces o7 the -&" s>stem Expain the inter)B&'intra)"&' hando;er process in the -&" s>stem using t>pica signas and a message seuence chart. Expain the decision points and the resource aocation stepsi7 the> exist.%6C *R0 0 hat is DAB Expain the components7rame 7ormat and the protoco used > DAB to access di77erent 7ormats o7 data aso descrie ho1 DGB is used 7or data roadcasting and to access high speed internet. %6C
%9. a0 i0 +sing EEE 8$2.%% D'0: &% and &2 send 'BR/+DP tra77ic to the common destination D. 'onsider &%&2 and D a 1ithin recei;e range o7 each other 1hen the asic scheme is used no RT&/'T&0: Descrie a coision 1hat happens e7oreduring and a7ter0.hat does the coision proaiit> depend on hen RT&/'T& is used: hat are the changes to the pre;ious ans1ers comment aso on the throughput and 7airness. %6C *R0 0 i0 Descrie the rie7> ho1 coision is a;oided in =PER!A,)%. 8C ii0Dra1 the protoco architecture o7 Buetooth and expain rie7> the Base and a>er and !2'AP o7 Buetooth. 8C
%(. a0 -i;en the net1or5 topoog> eo1 use the d>namic source routing agorithm to compute the shortest path 7rom A to a other nodes. "a5e sure to sho1 the resuts o7 the computation at each step.%6C @ B ))) D %/ / %2 / % /%$ A ))) ' )))))))) E 9% *R0
0 'onsider a moie node ", 7rom net1or5 H. The user o7 ", 1ishes to communicate 1ith a corresponding node ', in net1or5 #. The node ", mo;es 7rom H to a 7oreign net1or5 A. Descrie the seuence o7 messages that are reuired in "oie P;( so that ", and ', can continue to communicate. ncude oth the user data messages and the "oie P contro messages. ,o1 consider the case 1here ', mo;es to 7oreign net1or5 B 1hie ", is sti in the 7oreign net1or5 A. 'an ', and ", sti communicate Does "oie P support oth endpoints mo;ing 0 &ho1 the message 7o1 to indicate ho1 it 1i succeed or 7ai in this case. %6C %?. a0 As a transport a>er protoco T'P uses a 1indo1 mechanism to exercise 7o1 contro o;er the est e77ort P in the internet. o1 contro is exercised > the edge router ased on congestion status encountered in the core routers et1een teh T'P sender and T'P recei;er. i0 Descrie the operation o7 the 1indo1 7o1 contro mechanism. 8C ii0A'Js 7rom the T'P recei;er are the asis that the T'P sender uses to adLust the sending 1indo1 siFe. Descrie and discuss ho1 A'Js are used 7or this purpose. 8C *R0 0 &peci7> the enhancements made to the asic cient ser;er architecture o7 the 1e to suit a moie 1ireess user Brie7> discuss the main goas o7 AP. Expain the a>ers o7 AP protoco used to achie;e the 7oo1ing : A cient 1ants to ha;e a shared state 1ith the ser;er 7or trans7erring the content. %6C
DE-REE EHA",AT*, "*B!E '*"P+T,Time : Three =ours "aximum : %$$ mar5s PART A %$ x 2 4 2$ mar5s0 %. hat is a guard space 2. hat is '"DA 9. !ist the 7our possie hando;er and scenarios in -&" (. De7ine incination ange and ee;ation ange ?. -i;e the 8$2.%% P=# 7rame 7ormat using D&& 6. hat are the o1 po1er states o7 a ue tooth de;ice @. hat is a care o7 address 8. hat are the routing metrics in 1ireess adhoc net1or5 . hat is a 1ireess Teephon> appication %$. !ist the casses o7 transaction ser;ice o7 TP. PART B ? x %6 4 8$ mar5s0 %%. a0 Discuss in detai the ireess Transaction Protoco. %60 or0 0 Discuss in detai the ireess &ession Protoco %60 %2. a0 Expain time di;ision mutipe access %60 or0 0 i0 Discuss the spread spectrum techniues %$0 ii0 hat is 'ode Di;ision "utipexing Expain 60 %9. a0 i0 Discuss in detai ocaiFation caing and hando;er in -&" %$0 ii0 Expain the t>pes o7 orits in sateite s>stem 60 or0 0 i0 Expain the -&" s>stem architecture %20 ii0Expain the protoco architecture o7 DE'T (0 %(. a0 Discuss in detai the medium access contro mechanism o7 ''' 8$2.%% %60 or0 0 i0 Expain the in7ormation ases and net1or5ing o7 adhoc =PER!A,. 80 ii0 Discuss "A' a>er uetooth s>stem 80 %?. a0 i0Descrie tunneing and encapsuation in "oie P 80 ii0 Discuss in detai d>namic source routing 80 or0 0 i0 rite short notes on re;erse tunneing (0 ii0 Expain P pac5et dei;er> agent ad;ertisement disco;er> and registration process in moie P %20
DE-REE EHA",AT*, "*B!E '*"P+T,Time : Three =ours "aximum : %$$ mar5s PART A) %$x242$ mar5s0 %. hat is spreading 7actor 2. hat is poing 9. Distinguish et1een so7t hand o;er and hard hand o;er. (. De7ine 7ootprint 1ith respect to sateite s>stems.
?. &tate the three phases o7 the medium access o7 di77erent competing nodes. 6. hat are the po1er sa;ing mechanisms in Buetooth @. hat are the dra1ac5s o7 1ired net1or5s 8. De7ine: D>namic &ource Routing. . hat is the di77erence et1een T'P and +DP %$. "ention an> t1o saient 7eatures o7 AP. PART B) ?x%648$ mar5s0 %%.a0i0 Discuss in detai the t>pes o7 Antennas 1ith their radiation patterns. ii0 Expain Di;ersit> techniues. *R 0 Expain &pace reuenc> 'ode and Time Di;ision mutipexing in detai. %2.a0 Descrie Digita Audio Broadcasting. *R 0 Expain routing ocaiFation and hand o;er in sateite s>stems. %9.a0 Descrie the architecture o7 B!+E T**T=. *R 0 Expain channe contro su a>er in =PER!A,.
%(.a0 Expain optimiFation in "oie P in detai. *R 0 Expain P;6 protoco in detai. %?.a0 Discuss the roe o7 in support 7or moiit>. *R 0 Expain the 7oo1ing: i0 ndirect T'P. ii0 &nooping T'P. iii0 Expain aout per7ormance enhancing proxies.