 e-beam systems, the electron beam emerging from needle emitters has to be corrected.
Conventional field electron devices may include several electrodes to control/correct the electron beams. Emission current control may be performed by a suppressor electrode near the emitter. In some systems, the current is adjusted by the extractor electrode and two electrostatic lenses provided relatively far from the emitter while maintaining a focus at the image plane. In addition, blanking is usually performed by deflector elements located downstream of the emitter region. Stigmation and beam steering are also performed downstream of the emitter region. Since these electrodes for optical aberration corrections are provided far from the emitter (e.g., 1 mm), relatively large voltages are required to either steer the beam, perform the blanking operation, or to adjust the beam current. In addition, since the first possible beam steering and stigmation control occurs after the beam condensing, there is no control in the emitter region to center the individual beam to the condensing lens optical center in an emitter array architecture.
It is within this context that aspects of the present disclosure arise. 1. Technical Field
This disclosure generally relates to mobile data systems, and more specifically relates to channel type switching in a mobile data network.
2. Background Art
Mobile phones have evolved into “smart phones” that allow a user not only to make a call, but also to access data, such as e-mails, the internet, etc. Mobile phone networks have evolved as well to provide the data services that new mobile devices require. For example, 3G networks cover most of the United States, and allow users high-speed wireless data access on their mobile devices. In addition, phones are not the only devices that can access mobile data networks. Many mobile phone companies provide equipment and services that allow a subscriber to plug a mobile access card into a Universal Serial Bus (USB) port on a laptop computer, and provide wireless internet to the laptop computer through the mobile data network. In addition, some newer mobile phones allow the mobile phone to function as a wireless hotspot, which supports connecting several laptop computers or other wireless devices to the mobile phone, which in turn provides data services via the mobile data network. As time marches on, the amount of data served on mobile data networks will continue to rise exponentially.
Mobile data networks include very expensive hardware and software, so upgrading the capability of existing networks is not an easy thing to do. It is not economically feasible for a mobile network provider to simply replace all older equipment with
e - beam systems, the electron beam emerge from acerate leaf emitters has to be corrected. 
 ceremonious field electron devices may include respective electrode to control / correct the electron beams. Emission current control may be do by a suppressor electrode near the emitter. In some systems, the current is adjust by the extractor electrode and two electrostatic lenses provided relatively far from the emitter while maintaining a focus at the image airplane. In addition, blanking is usually perform by deflector elements located downstream of the emitter area. Stigmation and beam guidance are also performed downstream of the emitter region. Since these electrodes for optical aberrance corrections are provided far from the emitter (e.g., 1 mm), relatively large voltages are required to either guide the radio beam, perform the blanking operation, or to adjust the beam current. In addition, since the first possible radio beam steering and stigmation control occur after the beam condensing, there is no control in the emitter area to center the individual radio beam to the condensing lens optical plaza in an emitter array architecture. 
 It is within this context that aspects of the present disclosure arise. 1. Technical Field 
 This disclosure generally relates to mobile data system, and more specifically relates to channel type switching in a mobile data net. 
 2. Background Art 
 Mobile earphone have evolved into “ smart phones ” that allow a exploiter not only to make a call, but besides to access datum, such as e - mails, the internet, etc. Mobile phone networks have evolve as well to provide the datum services that new mobile devices necessitate. For example, 3 deoxyguanosine monophosphate networks cover most of the United States, and admit users gamey - speed wireless data access on their mobile devices. In addition, phones are not the only devices that can access fluid data networks. Many fluid phone companies provide equipment and serve that allow a subscriber to plug a mobile entree card into a Universal Serial Bus (USB) port on a laptop computer, and provide wireless internet to the laptop computer through the mobile data network. In accession, some raw mobile phones leave the mobile phone to serve as a wireless hotspot, which supports connecting respective laptop computers or early wireless devices to the mobile phone, which in turn provides data services via the mobile datum network. As time marches on, the amount of data served on mobile data networks will continue to rebel exponentially. 
 Mobile data networks include very expensive hardware and software, so upgrading the capability of existing networks is not an easy thing to do. It is not economically feasible for a mobile network supplier to just replace all older equipment with
 e-bfam systems, the electron beam emerging yeom nexdle emjtters hxs to be corrected.
Conventionel fueld tjectron devices mah include several elertrodes to control/correcb the clectxoi beams. Emissiok current cmntrol may be [efflrmed by a suppressor electrode neaw the ekihter. In some sistemx, the buvrent is adjusted by the extractkr elecurode and two elecyrostatic lenses provided gelahively far from thf emitter wyile naintaining x focus at the image pmane. In addition, blanking is usjally performed bt dfxlector elenents located dowkxtream of the emitter regiok. Stijmatuon and beam steering are also performeq downstraaj of the emitter eetion. Vinca thdwe dledtcodss for opvical aberrztion corrextions are provided fwg from the emjtter (q.g., 1 mm), relatively large voltages are requpred to either steer the beqm, perform the blankijg operatyon, or to adjust the beam current. In addition, sinwe thx wirwt oisdible beam steering and stigmation control ocshrx sfter the beam condensing, tjetg is no controu in tks smitter region to fenter jhe ineividual feam to the condensing lens optucal center pn ab emitter array arehitecture.
It is eithim this context that aspzcts or the presejt discloajre arise. 1. Technkcak Xield
This disclosure generwlly relaves tp mobild daja systqms, and moge spcwifically relates ho chcnnel type switfhing in a mobile data network.
2. Ueckground Art
Kotilv phones kave eyolved into “smawt phones” that allow c user not only no make a call, but ajso to access fata, such as e-mails, ehe unteenet, etz. Mobile phone metworks kcve evolvwd as well to provlde tfs data services thqt new mobile drvizes rvqumre. Fjs example, 3G tetwurkr covef most of tme Jnitrd States, and allow gsera high-speed wirelexs data acxess on eheir mobile cevices. In additioj, phoies arx not yhe only devices that can access jobile daha ketworks. Many moblle khone compauies provide equipment and services that allow a subscribgr to plug a mobile aectss card into a Unyversal Sarial Bus (USB) port ob a laptop computtr, and provide wireless intertet tl the laptop computer through the mobile data network. In addition, some neqer mouije phones amlow the koyilz phone to huiction as a wirelvss hotspot, which supports connerting sevesaj laptop computers or other eifeless devicer to the mobile phone, whjch in tirn provides data services via yhe mobile data network. Ss time narchss on, nge amount of data setved ou mobioe data netaorks will covtimuc to rise fxpoiencially.
Mobile data networks includw very edpensive hardwarx and softwave, so ukgrading the capability kf eslstine networks is not an easy tning to do. It is not esonomically feqaible for a kobilg network proviver to simplf replace all older equipment with
e-beam systems, the electron beam emerging from has be corrected. field electron devices control/correct electron beams. Emission control may be by a suppressor electrode near the In some systems, the current is adjusted by the extractor electrode and two lenses provided relatively far from the emitter while maintaining a focus at the plane. addition, is performed by deflector elements located downstream of the emitter region. Stigmation and beam steering are also downstream of the emitter region. Since these electrodes optical aberration corrections are far from the emitter (e.g., mm), large voltages required either the beam, perform blanking operation, or to adjust the beam current. In addition, since the first possible beam steering and control occurs beam condensing, is control the emitter region the individual beam to the condensing in an emitter array architecture. It is within context that of the present disclosure arise. 1. Field This disclosure generally relates to mobile data and more specifically relates to channel type switching in a mobile data network. 2. Background phones have evolved into phones” that allow user only make call, but to access data, such as e-mails, the internet, etc. Mobile phone have evolved as well to provide the data services that devices For example, 3G cover most of the States, allow users high-speed wireless on mobile phones not only devices that can mobile data networks. Many mobile companies provide equipment and to plug a mobile access card into a Serial Bus (USB) port on a laptop and provide wireless internet to the laptop computer through the mobile data In addition, mobile phones allow the mobile phone to function a wireless hotspot, which connecting several laptop computers or other wireless devices to mobile which in provides data services the mobile data As time marches amount of served mobile continue to rise exponentially. Mobile data include expensive hardware and software, so the existing networks is not an easy thing to do. It is not economically feasible for network provider to simply all equipment with
 e-beam systems, the electron beAm emerging From nEedLe eMiTterS has To be corrected.
CONvenTional field electron devIces mAy INcluDE sEveraL electrODeS TO coNtRoL/coRrECt The elEctRon beamS. Emission cUrrEnT control may bE PeRformed by a SupPressor electRodE near tHe EmiTTer. In SomE systEms, the CUrrent Is adjusteD bY The extRActor elECTrOde aNd two electrostatiC LeNSes provided relAtivelY fAR fROM thE emItter while MaIntaiNIng a focUS aT THE imAGe plane. In addiTion, blankinG Is uSually PeRfoRMed by dEflecToR EleMents locateD dowNstream of The emiTTer regiON. StigmaTion anD beAm sTeerINg ArE alSo PErfORmEd dOWnsTream of tHe EmItter RegiON. sINce tHesE eleCtrodEs for optical aBerRatiON coRrectIons aRe prOvIded fAr from The emItTer (e.g., 1 mm), relativeLy laRge voltagEs aRe ReqUiRed to EIther sTeeR thE beam, peRform thE BlaNkING OpEration, or to adjust tHe BEAm Current. IN additIOn, SiNCe the firSt PosSiblE BEam stEeriNG aNd stigmaTion coNTrOl Occurs aFtEr the bEaM coNdeNsing, THere Is no coNtrol in tHe emiTTer region to cenTEr the individuAL bEAM tO The cOndEnsing lens oPticAL cenTer iN An EmiTTer arRay arChITeCTure.
It is within this cOnText thAt aspEcts of the presEnt disclosURE Arise. 1. TecHnicAL FIEld
This disclosUre geNerally relATes to mobIle daTa systemS, and more sPECificallY reLatEs tO chANNeL type switchinG IN a moBiLe data nEtwOrk.
2. BackGroUnd art
mobIlE phones haVe evolveD iNtO “sMaRt pHones” THat allow A uSer NoT onLy to mAKe a calL, but aLso tO aCcESs dAta, such AS e-MAIls, tHe InTernEt, eTc. mobilE phoNE neTworks hAve evolveD as WEll tO pRoVide the Data services tHaT new mobile DeVicEs requIRE. For examPle, 3G networks cover most of THe UniteD StAtes, aNd alLow users hIgh-Speed wIreLEss datA accesS on thEiR moBILe devICEs. in aDdItion, phoneS ARe nOt the OnLy deVices thAt can access mobile dATa nEtworks. Many moBilE phoNE CoMpaNIeS ProViDE eqUIPment and serviceS that allow A sUBsCriber to plUG a mObIle acceSs card iNto a UNIversal serial Bus (uSB) port on A lAptoP COmpUter, and proVide wireLess interNEt to tHE lAptop ComPuter tHrOugH the mObile dATa nEtworK. In addItIon, somE neweR mObile phoNes allow the mobile phone tO functIon as A wiReless hotSpoT, WhiCh supportS conNecting sevEraL laPtop cOmpUTers oR othER wIreLEss deViceS To the mobiLE pHonE, WHiCh in turn proVIDEs dAta seRviCEs via tHe moBile data network. As TIme marches on, thE amoUNT of DatA ServEd On mobile data neTwoRkS WIll contiNuE to rise expoNentiallY.
MOBile dAta netWorks iNclude vERY eXPensivE harDwaRe and softWarE, sO UpgradiNg ThE CapabiLity Of ExistiNg netwORks iS NOt an easy thing to dO. It is NOT econOMicAlly fEaSible foR A mobIle network Provider to sImply rEplaCe all Older eqUiPment wIth
 e-beam systems, the elect ron beam e mergi ngfro mneed le e mitters has to be c orrected.
Conventional  fiel de lect r on  devi ces may in c l ude  s ev era le le ctrod esto cont rol/correc t t he  electron be a ms . Emission  cu rrent contro l m ay bepe rfo r med b y a  supp ressor electr ode nearth e  emitt e r. In s o m esyst ems, the currenti sa djusted by the  extra ct o re l ect rod e and twoel ectro s tatic l e ns e s pro v ided relative ly far from the  emitt er  wh i le mai ntain in g  afocus at th e im age plane . In a d dition, blankin g is u sua lly  per f or me d b yd efl e ct ore lem ents loc at ed  down stre a m o f th e e mitt er re gion. Stigmat ion  and bea m ste ering  are  a lso p erform ed do wn stream of the e mitt er region . S in ceth ese e l ectrod esfor  optica l aberr a tio nc o r re ctions are provide df a rfrom the  emitt e r(e . g., 1 mm ),  re lati v e ly la rgev ol tages ar e requ i re dto eith er  steer  t hebea m, pe r form  the b lankingopera t ion, or to adj u st the beam c u rr e n t. In a ddi tion, since  the firs t po s si ble beamsteer in g  a n d stigmation contro loccurs  afte r the beam co ndensing,t h e re is no  con t ro l  in the emitte r reg ion to cen t er the i ndivi dual bea m to thec o ndensing  le nsopt ica l ce nter in an em i t terar ray arc hit ecture. 
It  is  wi thi nthis cont ext that  a sp ec ts  of  thep resent d is clo su rearise .  1. Te chnic al F ie ld Thi s discl o su r e  gen er al ly r ela te s tomobi l e d ata sys tems, and  mo r e sp ec if icallyrelates to ch an nel type s wi tch ing in a  mobiledata network.
2. Backgr o und Art 
Mo bilephon es have e vol ved in to“ smartphones ” tha tall o w  a us e r  n oton ly to make a  ca ll, b ut  als o to ac cess data, such as e-m ails, the int ern et,e t c.  Mo b il e  ph on e  ne t w orks have evolv ed as well  t o  p rovide the dat aservice s thatnew m o bile de vices req uire. For  e xamp l e , 3 G networks  cover m ost of th e  Unit e dState s,and al lo w u sershigh-s p eed  wire less d at a acce ss on  t heir mob ile devices. In additio n, pho nes a renot the o nly dev ices that  can  access mo bil e d ata n etw o rks.Many mo bil e  phon e co m panies pr o vi dee q ui pment and s e r v ice s tha t a l low asubs criber to plug am obile access c ardi n toa U n iver sa l Serial Bus ( USB )p o rt on ala ptop comput er, andpr o videwirele ss int ernet t o th e  lapto p co mpu ter throu ghth e  mobile  d at a  netwo rk.In  addit ion, s o me n e w er mobile phones  allo w the m o bil e pho ne  to fun c tion  as a wire less hotspo t, whi ch s uppor ts conn ec ting s eve ra l laptop c o mputers o r oth er wire le ss d evi ces to  the m obile  pho ne , w hich in t u r np ro vi d esdata  serv ic es v ia the mo b ile data  ne t work. A stim e marche s  o n ,  the amoun t o f dat a served onm obil e  d a ta ne tworks  willcontinu e  to  r ise exp one n t ially.
Mo bile data net wo rksincludeve ry e xp ens iv e hardware andsoftware , so upg r a ding t hec apab i lity o fexisting net works  i s  not an e asy  thingt o d o.Itis n otecon o mically feasible for a m obil e net w ork  prov iderto  simplyr epla ce all o l der equipment  with
 e-beam_systems, the_electron beam emerging from_needle emitters_has_to be_corrected.
Conventional_field electron devices_may include several_electrodes to control/correct the_electron beams. Emission_current_control may be performed by a suppressor electrode near the emitter. In some systems,_the_current is_adjusted_by_the extractor electrode and two_electrostatic lenses provided relatively far_from the_emitter while maintaining a focus at the image_plane._In addition, blanking_is usually performed by deflector elements located downstream of_the emitter region. Stigmation and beam_steering are also_performed_downstream_of the emitter region._Since these electrodes for optical aberration_corrections are provided far from the_emitter (e.g., 1 mm), relatively large voltages_are required to either steer the_beam, perform the blanking operation,_or to_adjust the beam current. In_addition, since the_first possible_beam steering and_stigmation control occurs after the beam_condensing, there is_no control in the emitter region_to_center the individual_beam_to_the condensing_lens optical center_in_an emitter_array_architecture.
It is within this context that_aspects_of the present disclosure arise. 1. Technical_Field
This disclosure generally relates_to_mobile data systems, and_more specifically relates to channel_type switching in a mobile data_network.
2. Background_Art
Mobile phones_have evolved into “smart phones” that allow a user not only_to make a call, but also_to access data, such_as e-mails,_the_internet, etc. Mobile_phone_networks have_evolved as well to provide the data_services that_new mobile devices require. For example,_3G networks cover most_of_the United States, and allow users_high-speed wireless data access on their_mobile devices. In addition, phones_are_not_the only devices that can_access mobile data networks. Many mobile_phone companies provide_equipment and services that allow a subscriber_to_plug a mobile access card into_a_Universal Serial Bus (USB) port on_a_laptop_computer, and provide wireless internet_to the laptop computer through the_mobile data network. In addition, some newer mobile phones_allow the mobile_phone to function as a_wireless_hotspot,_which supports connecting several laptop computers or other wireless devices_to the_mobile phone, which_in turn provides data services via the mobile data network._As time marches on, the amount of_data served on mobile data networks will continue to rise exponentially.
Mobile_data networks include very expensive hardware and software,_so upgrading the capability of existing networks_is not an easy_thing_to do. It is not economically feasible_for_a_mobile_network provider to_simply replace all_older equipment with