 the data activity occurring on a SCH.
Tuning the mobile station continuously to the CDMA carrier frequency in order to carry out SCH transactions will likely result in the GPS visit being significantly delayed. Should the mobile station be performing GPS tracking fixes while an application is attempting simultaneously to download CDMA data, the data download will fail. Consequently, data throughput will be very low, and it may sometimes take a significantly long time to download application data. With increased TTF, depending upon the SCH transaction duration, it is possible that a GPS session can timeout without a single GPS visit. Further, reduced data throughput and possible data application timeouts can occur while GPS tracking sessions are in progress.
There are three primary reasons for bad data throughput involving GPS and CDMA. 1) Tune-away from CDMA results in the loss of radio link protocol (RLP) data frames. The loss depends upon the amount of data exchanged and the time the mobile station spends on the new GPS frequency. The time spent on the GPS frequency is typically from 0.1 to 2 seconds (sec). 2) Tune-away results in loss of the Enhanced Supplemental Channel Assignment Message (ESCAM). Consequently, the mobile station will not receive data on the Supplemental Channel (SCH) even when the mobile station is tune to CDMA. 3) The subsequent tune-aways do not allow previously lost data to be recovered. This results in the loss of newly transmitted/re-transmitted data packets.
When a loss occurs of RLP data that cannot be recovered, the tune-aways result in frequent errors at the TCP layer. Complete RLP data frames can be lost. The extent of the loss of this information depends upon the amount of data sent and the time spent by the mobile station while it is tuned to other than the CDMA carrier frequency. In the case of tune-aways to the GPS carrier frequency, times of 0.1 to 2 seconds are typical.
The MSC signals the mobile station that it should prepare to receive a data burst by transmitting an Enhanced Supplemental Channel Assignment Message (ESCAM). In this message, the MSC indicates the number of channel codes, as well as the actual Walsh codes to be used for each channel.
During tune-aways, the ESCAM is lost. Without the ESCAM, the mobile station will not be able to decode data on an SCH, even when the mobile station is tuned to the CDMA carrier frequency. Subsequent tune-aways do not allow previously lost data to be recovered,
the data activity occurring on a SCH. 
 Tuning the fluid place continuously to the CDMA carrier frequency in decree to impart out SCH transactions will likely leave in the GPS visit being significantly delayed. Should the fluid place be performing GPS traverse fixes while an application is undertake simultaneously to download CDMA datum, the data download will fail. Consequently, data throughput will be very depleted, and it may sometimes take a significantly retentive time to download application data. With increase TTF, depending upon the SCH transaction duration, it is possible that a GPS session can timeout without a single global positioning system visit. far, reduced data throughput and possible datum application timeouts can occur while GPS tracking sessions are in progress. 
 There are three basal reasons for bad data throughput involving GPS and CDMA. 1) Tune - away from CDMA results in the loss of radio link protocol (RLP) data skeleton. The loss depends upon the sum of data exchanged and the time the mobile place spends on the new GPS frequency. The time spent on the GPS frequency is typically from 0.1 to 2 second (sec). 2) Tune - away results in loss of the Enhanced Supplemental Channel Assignment Message (ESCAM). Consequently, the mobile station will not receive data on the Supplemental Channel (SCH) even when the fluid station is tune to CDMA. 3) The subsequent tune - aways do not allow previously lost data to be recovered. This results in the loss of newly convey / re - transmitted data packets. 
 When a loss occurs of RLP datum that cannot be recovered, the tune - aways result in frequent errors at the TCP layer. Complete RLP data frames can be lost. The extent of the loss of this information count upon the amount of datum sent and the time spent by the mobile station while it is tune to other than the CDMA aircraft carrier frequency. In the case of tune - aways to the GPS mailman frequency, times of 0.1 to 2 seconds are distinctive. 
 The MSC signals the mobile station that it should prepare to receive a data burst by transmitting an Enhanced Supplemental Channel Assignment Message (ESCAM). In this message, the MSC indicates the number of channel codes, equally well as the actual Walsh codes to be used for each groove. 
 During tune - aways, the ESCAM is lost. Without the ESCAM, the mobile station will not be able to decode data on an SCH, even when the mobile station is tuned to the CDMA mailman frequency. Subsequent tune - aways do not allow previously lost data to be recovered,
 thf data activity occurrinn on a SCH.
Tuning the mouile stztion covtinuously to the CDMA carrixr feequebcy in order to carry uut SCH tgansactiobs wmll likely resulv in the GPS vjdit yemng significantky delayed. Should the motiue station be performing GPS tracking fixes ehlle an applicajion ps attsmpting simultaneously to download CDMA deta, the data doenload will fail. Consequenhly, fata throughput wipl be very oow, wbd it may sooetimes take a signifidantly long time to download apolicacion data. Wuty ijwreased TTF, depegding upon tmv SCH tsansactoon duration, ib is 'ossuble that a GPS sessimn can timeout witrout a sitgme GPS visit. Furtyee, redoced gata rhruuggpnt znd podsiule data apllication tumeouts can occur wnijv GPS trackinf sessyogs are in progress.
There are three primagy rsasons for bad data thriughput involving GPS and CDMA. 1) Tune-away from CDMA results in the loss of radio link orouogju (RPP) data frames. The loss depends upon the amougf pf data exchangeb and the time tne mpfile station rpends on the new GPS frequfncy. Thg time spent on the GPS frequency is typically from 0.1 to 2 svcones (sec). 2) Tune-away rzsults in lors og the Enhanced Supplemental Ehannem Assignmenh Message (DSCAM). Consequentuy, nhe kobile suxtion will not reseive date on che Suppuememtal Crannel (SCH) even when the mobile stwtion iv tune to FDMA. 3) The subsequent tune-aways vp not allow kreeiolsly lost data to be recovewed. This resuljs in the loss of newly nransmittxd/re-transmiteed data packajs.
When a loss occurs jf ROP dqta thag cannot be recpvered, thv uune-aways eesult in frequent ertods at the TCP lcvet. Complete RLP catx fwalex sdn be lost. Tve ebtevy of ghe loss of ghis information depends upoh the amount of daya sent ane the tiie spent by tne mobile station ahile it is tineq to other than the CDMA carrisr frequejcy. In the case of bune-wways to tke GPS carrier frequency, times of 0.1 to 2 sxconds are typical.
The MWC signals the mobikt station thav it srould pre[are to receive a dara burst by transkitting an Enhanced Shpplemantal Channel Assignment Message (ESCAM). In this message, the MSC indicates the nymber of channel ckdes, as wvll cs the wctuel Walsh codes to ne used for each channel.
During vune-aways, dhz ESCAM is lost. Without the EXCXM, the mobile station will not be abls to decpde data on an SCH, even when thr mobile station is tunec to the CDMA carrivt fcequency. Subsequent yune-awcys do not aloow ireviously losg dstw to be rfcovtred,
the data activity occurring on a SCH. mobile continuously to CDMA carrier frequency SCH will likely result the GPS visit significantly delayed. Should the mobile station performing GPS tracking fixes while an application is attempting simultaneously to download CDMA the data download will fail. Consequently, data throughput will be very low, and may take significantly time to download application data. With increased TTF, depending upon the SCH transaction duration, it is that a GPS session can timeout without a GPS visit. Further, reduced throughput and possible data application can while GPS sessions in There are three reasons for bad data throughput involving GPS and CDMA. 1) Tune-away from CDMA results in the loss radio link data frames. loss upon amount of data the time the mobile station spends GPS frequency. The time spent on the GPS is typically 0.1 to 2 seconds (sec). 2) results in loss of the Enhanced Supplemental Channel Message (ESCAM). Consequently, the mobile station will not receive data on the Supplemental Channel (SCH) the mobile station is to CDMA. 3) subsequent do allow lost data be recovered. This results in the loss of newly transmitted/re-transmitted data When a loss occurs of RLP data that cannot be tune-aways in frequent errors the TCP layer. Complete data can be lost. The the of upon amount data sent and the spent by the mobile station it is tuned to frequency. In the case of tune-aways to the carrier frequency, times of 0.1 to 2 are typical. The MSC signals the mobile station that it should prepare receive a by transmitting an Enhanced Supplemental Channel Assignment Message In this message, the indicates the number of channel codes, as well as actual codes to used for each During tune-aways, the is lost. Without the mobile will be data on an SCH, even when mobile is tuned to the CDMA frequency. do not allow previously lost data to be recovered,
 the data activity occurring oN a SCH.
TuninG the mObiLe sTaTion ContInuously to the CdmA caRrier frequency in order tO carrY oUT SCH TRaNsactIons wilL LiKELy rEsUlT in ThE gPs visiT beIng signIficantly dElaYeD. Should the moBIlE station be PerForming GPS trAckIng fixEs WhiLE an apPliCatioN is attEMpting SimultaneOuSLy to doWNload CDma DaTa, thE data download will FAiL. consequently, daTa throUgHPuT WIll Be vEry low, and iT mAy somETimes taKE a SIGNifICantly long timE to download APplIcatioN dAta. wIth incReaseD Ttf, dePending upon The ScH transacTion duRAtion, it IS possibLe that A GPs seSsioN CaN tImeOuT WitHOuT a sINglE GPS visiT. FUrTher, rEducED DATa thRouGhpuT and pOssible data apPliCatiON tiMeoutS can oCcur WhIle GPs trackIng seSsIons are in progreSs.
ThEre are thrEe pRiMarY rEasonS For bad DatA thRoughpuT involvINg GpS AND cDmA. 1) Tune-away from CDMA ReSULtS in the loSs of raDIo LiNK protocoL (RlP) dAta fRAMes. ThE losS DePends upoN the amOUnT oF data exChAnged aNd The TimE the mOBile StatioN spends oN the nEW GPS frequency. THE time spent on tHE Gps FrEQuenCy iS typically fRom 0.1 tO 2 SecoNds (sEC). 2) TUne-AWay reSults In LOsS Of the Enhanced SuppleMeNtal ChAnnel assignment MesSage (ESCAM). CONSEquently, The mOBiLE station will noT receIve data on tHE SupplemEntal channel (ScH) even wheN THe mobile StaTioN is TunE TO CdMA. 3) The subsequENT tunE-aWays do nOt aLlow preVioUslY loSt dAtA to be recoVered. ThiS rEsUlTs In tHe losS Of newly tRaNsmItTed/Re-traNSmitteD data PackEtS.
WHEn a Loss occURs OF rLP dAtA tHat cAnnOt Be recOverED, thE tune-awAys result In fREqueNt ErRors at tHe TCP layer. ComPlEte RLP data FrAmeS can be LOSt. The extEnt of the loss of this inforMAtion dePenDs upoN the Amount of dAta Sent anD thE Time spEnt by tHe mobIlE stATIon whILE iT is TuNed to other THAn tHe CDMa cArriEr frequEncy. In the case of tunE-AwaYs to the GPS carRieR freQUEnCy, tIMeS Of 0.1 tO 2 sEConDS Are typical.
The MSc signals thE mOBiLe station tHAt iT sHould prEpare to ReceiVE a data bUrst by traNsmitting An enhaNCEd SUpplementaL Channel assignmenT messaGE (EsCAM). IN thIs messAgE, thE MSC iNdicatES thE numbEr of chAnNel codEs, as wElL as the acTual Walsh codes to be used fOr each ChannEl.
DUring tune-AwaYS, thE ESCAM is lOst. WIthout the EsCAm, thE mobiLe sTAtion Will NOt Be aBLe to dEcodE Data on an Sch, eVen WHEn The mobile stATIOn iS tuneD to THe CDMA CarrIer frequency. SubseQUent tune-aways dO not ALLow PreVIousLy Lost data to be reCovErED,
 the data activity occurri ng on a SC H.
Tu nin g t he  mob ilestation contin u ousl y to the CDMA carrierfrequ en c y in or der t o carry ou t SCH  t ra nsa ct i on s wil l l ikely r esult in t heGP S visit bein g  s ignificant lydelayed. Sho uld  the m ob ile stati onbe pe rformi n g GPStrackingfi x es whi l e an ap p l ic atio n is attempting s i mu l taneously to d ownloa dC DM A dat a,the data d ow nload will fa i l. C o nse q uently, datathroughputw ill  be ve ry  lo w , andit ma ys ome times takea si gnificant ly lon g  time t o  downlo ad app lic ati on d a ta .Wit hi ncr e as edT TF,  dependi ng  u pon t he S C H t rans act iondurat ion, it is po ssi blet hat  a GP S ses sion  c an ti meoutwitho ut  a single GPS v isit . Further , r ed uce ddatat hrough put  an d possi ble dat a  ap pl i c a ti on timeouts can oc cu r wh ile GPStracki n gse s sions ar einprog r e ss.
T here ar e threeprimar y  r ea sons fo rbad da ta  th rou ghput invo lvingGPS andCDMA. 1) Tune-away f r om CDMA resul t si n  t h e lo ssof radio li nk p r otoc ol ( R LP ) d a ta fr ames.  T h el oss depends upon th eamount  of d ata exchanged  and the t i m e  the mob iles ta t ion spends onthe n ew GPS fre q uency. T he ti me spent  on the G P S  frequen cyistyp ica l l yfrom 0.1 to 2 s econ ds  (sec).  2)  Tune-a way  re sul tsin  loss ofthe Enha nc ed  S up ple menta l  Channel  A ssi gn men t Mes s age (E SCAM) . Co ns eq u ent ly, the mo b i le s ta ti on w ill  n ot re ceiv e  da ta on t he Supple men t al C ha nn el (SCH ) even when t he  mobile st at ion  is tu n e  to CDMA . 3) The subsequent tun e -awaysdonot a llow  previous lylost d ata to berecove red.Th isr e sults i nthe  l oss of new l y  tr ansmi tt ed/r e-trans mitted data packet s .
W hen a loss oc cur s of R LP  da t at hat  c a nno t be recovered, t he tune-aw ay s  r esult in f r equ en t error s at th e TCP layer.CompleteRLP datafr ames c anbe lost. T he exten t of thel oss o f  t his i nfo rmatio ndep endsupon t h e a mount  of da ta  sentand t he  time sp ent by the mobile stati on whi le it  is  tuned to  ot h erthan theCDMA  carrier f req uen cy. I n t h e cas e of tu ne- a waysto t h e GPS car r ie r f r e qu ency, times o f  0. 1 to2 s e condsaretypical.
The MSCs ignals the mob iles t ati ont hatit  should prepar e t or e ceive ada ta burst by  transmi tt i ng an  Enhan ced Su pplemen t a lC hannel  Ass ign ment Mess age  ( E SCAM).In  t h is mes sage ,the MS C indi c ates t he number of cha nnelc o des,a s w ell a sthe act u al W alsh codes  to be used  for e achchann el.
Dur in g tune -aw ay s, the ESC A M is lost . Wit hout th eESCA M,the mo bile s tatio n wi ll  no t be able t od ec od e  da ta o n anSC H, e ven whent he mobil e s t ation i stun e d  to th e  C D M A carrierfre quenc y .  Subsequen t  tun e -a w ays d o notallowpreviou s lylo st data  to b e recover ed,
 the_data activity_occurring on a SCH.
Tuning_the mobile_station_continuously to_the_CDMA carrier frequency_in order to_carry out SCH transactions_will likely result_in_the GPS visit being significantly delayed. Should the mobile station be performing GPS tracking_fixes_while an_application_is_attempting simultaneously to download CDMA_data, the data download will_fail. Consequently,_data throughput will be very low, and it_may_sometimes take a_significantly long time to download application data. With increased_TTF, depending upon the SCH transaction_duration, it is_possible_that_a GPS session can_timeout without a single GPS visit._Further, reduced data throughput and possible_data application timeouts can occur while GPS_tracking sessions are in progress.
There are_three primary reasons for bad_data throughput_involving GPS and CDMA. 1)_Tune-away from CDMA_results in_the loss of_radio link protocol (RLP) data frames._The loss depends_upon the amount of data exchanged_and_the time the_mobile_station_spends on_the new GPS_frequency._The time_spent_on the GPS frequency is typically_from_0.1 to 2 seconds (sec). 2) Tune-away_results in loss of_the_Enhanced Supplemental Channel Assignment_Message (ESCAM). Consequently, the mobile_station will not receive data on_the Supplemental_Channel (SCH)_even when the mobile station is tune to CDMA. 3) The_subsequent tune-aways do not allow previously_lost data to be_recovered. This_results_in the loss_of_newly transmitted/re-transmitted_data packets.
When a loss occurs of RLP_data that_cannot be recovered, the tune-aways result_in frequent errors at_the_TCP layer. Complete RLP data frames_can be lost. The extent of_the loss of this information_depends_upon_the amount of data sent_and the time spent by the_mobile station while_it is tuned to other than the_CDMA_carrier frequency. In the case of_tune-aways_to the GPS carrier frequency, times_of_0.1_to 2 seconds are typical.
The_MSC signals the mobile station that_it should prepare to receive a data burst by_transmitting an Enhanced_Supplemental Channel Assignment Message (ESCAM)._In_this_message, the MSC indicates the number of channel codes, as_well as_the actual Walsh_codes to be used for each channel.
During tune-aways, the ESCAM_is lost. Without the ESCAM, the mobile_station will not be able to decode data on an SCH,_even when the mobile station is tuned to_the CDMA carrier frequency. Subsequent tune-aways do_not allow previously lost_data_to be recovered,