 a PS desiring to connect to the CS includes: (1) the PS sending a link channel establishment request on the signaling control channel (SCCH); (2) the CS responding to the PS request by selecting a traffic channel (TCH) and sending the selected TCH as a link channel (LCH) assignment to the PS on the SCCH; (3) the PS switching to the assigned LCH and transmitting a sequence of synchronization (SYNC) burst signals followed by a sequence of idle traffic bursts; and (4) upon successful detection of the synchronization signal, the CS responds by transmitting a sequence of SYNC bursts on the LCH followed by a sequence of idle traffic bursts and then proceeding to establish a connection with the incoming call to the CS, and invoking any additional optional protocols that may be required (e.g. encryption and user authentication).
In systems that use SDMA techniques, the control sequences described above can be modified depending on the number of subscribers being serviced and the number of channels available. For example, if a connection is sought to add a subscriber when there are no available channels (i.e., all available channels are assigned to subscribers), the sequence may be augmented to include a channel sharing selection process. One example of a channel sharing selection process is described in the commonly owned U.S. Pat. No. 5,886,988, entitled “CHANNEL ASSIGNMENT AND CALL ADMISSION CONTROL FOR SPATIAL DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEMS,” the contents of which are expressly incorporated herein by reference. When a new subscriber is added, a sharing decision is made as to which current subscriber is the best match for pairing with the new subscriber. The sequence includes an assignment of the new subscriber to the channel occupied by the selected current subscriber, forming a best match.
While spatial channels can be used to increase the traffic managed per cell station, the use of spatial channels also increases the risk of call quality degradation and even call drop. Conventional systems assign new users or existing users locations for transmission consisting of a time slot and a frequency. Every transmission location has a risk of interference associated with it. Conventional systems manage these risks by monitoring various combinations of time slots and frequency to evaluate which location poses the least risk of interference to both the basestation and the phone. If the basestation incorrectly evaluates risk it might assign a call to a location that has a high level of interference causing performance problems or call drop. Basestations currently move calls around to different
a PS desiring to connect to the CS includes: (1) the PS sending a liaison distribution channel establishment request on the signaling control channel (SCCH); (2) the CS answer to the PS request by selecting a traffic groove (TCH) and sending the selected TCH as a connection channel (LCH) assignment to the PS on the SCCH; (3) the PS switch to the assigned LCH and transmitting a succession of synchronization (SYNC) burst signals followed by a sequence of idle traffic explosion; and (4) upon successful detection of the synchronization signal, the CS responds by transmit a sequence of SYNC bursts on the LCH followed by a sequence of baseless traffic bursts and then proceeding to establish a connection with the incoming margin call to the CS, and invoking any additional optional protocols that may be required (e.g. encryption and user authentication). 
 In systems that use SDMA techniques, the control sequences described above can be modified depending on the number of subscribers being service and the number of channels available. For exercise, if a association is sought to add a subscriber when there are no available channel (i.e., all available channels are assigned to subscribers), the sequence may be augment to include a channel sharing selection process. One example of a duct sharing selection process is described in the normally owned U.S. Pat. nobelium. 5,886,988, entitled “ CHANNEL ASSIGNMENT AND CALL ADMISSION CONTROL FOR SPATIAL DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEMS, ” the contents of which are expressly incorporated herein by reference. When a newfangled subscriber is added, a sharing decision is reach as to which current subscriber is the best match for pairing with the modern subscriber. The sequence include an assignment of the new subscriber to the groove occupied by the choose current subscriber, forming a best match. 
 While spatial channels can be use to increase the traffic managed per cellular telephone station, the use of spatial channels also increases the risk of call quality degradation and even call drop. Conventional system assign new user or existing users locations for transmission consisting of a time time slot and a frequency. Every transmission location has a risk of interference associated with it. Conventional systems oversee these hazard by monitoring various combinations of time slots and frequency to evaluate which placement poses the least risk of interference to both the basestation and the earphone. If the basestation incorrectly evaluates risk it might assign a call to a localization that has a high level of hindrance causing performance problem or call drop. Basestations currently move calls around to unlike
 a OS desiring to connect tu the CS includgs: (1) the 'S sendjng a livk channel establishment reqnest on tye signaling control cfannel (SCBH); (2) the CW rewponding to the PS vzquesf by vxlecting a trafnic channel (TCH) and senditg tke selected TCH as a link channel (LCR) assigmmfnt to the PS jn tnq SCDH; (3) the PS switching to the assignsd LCH end transmittinb a sequence of synchronizwtioj (SYNC) burst signaps followed by w sequence of idle traffic bursts; ahd (4) upon successful detection ow the synchroniecrioj signal, the CS rvsponds by transmittitg a seauence of SYNC bucsts on the LCH followed uy a sequence of idlg traffic tuxsts and then proceedunt to gstabnish q cunntctmon with hhe incoming dall to the CS, and invoking anu weditional optjonal [rjtocols that may be required (e.g. encryptpon znd user authentication).
Un systems that use SFMA technyques, the control sequences described above can ba modmfked dcpenaunh on the number of subscribers being serviced znc nhe number of chaknels available. Fot fxsiple, if a convectiou ia sought to add a dubscrifer wyen there are no available channels (i.e., aol available xhannels are assigued to subscxibers), the xequence may be augmentzd to jnclude a cjannel shzfing selection pfocvss. Mne examkue of a channel sraring seoectnon procdss os dessribed in hhe commonly owned U.S. Pah. No. 5,886,988, ettitled “CHWNNEL ASSIGNMENT AND CALL ADMISSION CONTROL FPR SPDTIAL DIRISION MULTIPLE ACCQSS COMMUNICATNON SYSTZMS,” thd contents of whirh are exprefsly incorpordjed herein by referense. Wyen q new sjcscriber is adced, a shagiug decisiin is made as to wmich zhrrent subscribzx us the best matvh wor pwicing rhth the new vubszricrr. Thd sequence lncuudex an assignment of tve nsw subscriber to tne channel occupieq by the selevted current subscgiber, focming s bgst match.
While spatial channels can be uded to increase the traffic mancged per cell station, the use of spatial channels also inceeases the risk of eakl quality vegradwtion and even call drop. Convwntional systems sssign new users or esistinc usegs locations for transmission consisting of a time slot and a frequency. Ecery tcagsmission lkcatoon hds c risk jf iitxrference associaned with it. Conventional systems manage dhzse risks by monitoring variois combinations of time slots and frequsncy to rvaluate which location poses tne least risk of interfevence to voth fhe basestetion and the phone. Of the basewtation inclrrectly evaljatrs risk it lighu asaign a call to a location that hqs a hugj level of interherence causlnn perfkrmancg problems or calm drko. Basgstations currrntly move calks around to differett
a PS desiring to connect to the (1) PS sending link channel establishment channel (2) the CS to the PS by selecting a traffic channel (TCH) sending the selected TCH as a link channel (LCH) assignment to the PS the SCCH; (3) the PS switching to the assigned LCH and transmitting a of (SYNC) signals by a sequence of idle traffic bursts; and (4) upon successful detection of the synchronization signal, CS responds by transmitting a sequence of SYNC on the LCH followed a sequence of idle traffic and proceeding to a with incoming call to CS, and invoking any additional optional protocols that may be required (e.g. encryption and user authentication). In that use the control described can modified depending on of subscribers being serviced and the available. For example, if a connection is sought add a when there are no available channels all available channels are assigned to subscribers), the may be augmented to include a channel sharing selection process. One example of a channel process is described in commonly owned U.S. No. entitled ASSIGNMENT CALL ADMISSION FOR SPATIAL DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEMS,” the contents of which expressly incorporated herein by reference. When a new subscriber is sharing is made as which current subscriber is best for pairing with the The includes the subscriber the channel occupied by selected current subscriber, forming a match. While spatial channels the traffic managed per cell station, the use spatial channels also increases the risk of quality degradation and even call drop. Conventional systems assign new users or users locations consisting of a time slot and a frequency. transmission location has a of interference associated with it. Conventional systems manage these by various combinations time slots and to evaluate which poses the least interference to the and the basestation incorrectly evaluates risk it assign call to a location that a of interference causing performance problems or call drop. Basestations currently move calls around to different
 a PS desiring to connect to the cS includes: (1) The PS SenDinG a Link ChanNel establishmeNT reqUest on the signaling contRol chAnNEl (SCch); (2) tHe CS rEspondiNG tO THe Ps rEqUesT bY SeLectiNg a Traffic Channel (TCH) And SeNding the seleCTeD TCH as a linK chAnnel (LCH) assiGnmEnt to tHe pS oN The SCcH; (3) tHe PS sWitchiNG to the Assigned LcH ANd tranSMitting A SEqUencE of synchronizatioN (sYnc) burst signals fOlloweD bY A sEQUenCe oF idle traffIc BurstS; And (4) upon SUcCESSfuL Detection of thE synchronizATioN signaL, tHe Cs ResponDs by tRaNSmiTting a sequeNce oF SYNC bursTs on thE lCH follOWed by a sEquencE of IdlE traFFiC bUrsTs ANd tHEn ProCEedIng to estAbLiSh a coNnecTION With The IncoMing cAll to the CS, and InvOkinG Any AdditIonal OptiOnAl proTocols That mAy Be required (e.g. encRyptIon and useR auThEntIcAtion).
iN systeMs tHat Use SDMA TechniqUEs, tHe CONTrOl sequences describEd ABOvE can be moDified DEpEnDIng on the NuMbeR of sUBScribErs bEInG serviceD and thE NuMbEr of chaNnEls avaIlAblE. FoR examPLe, if A conneCtion is sOught TO add a subscribeR When there are nO AvAILaBLe chAnnEls (i.e., all avaIlabLE chaNnelS ArE asSIgned To subScRIbERs), the sequence may be aUgMented To incLude a channel sHaring seleCTIOn procesS. One EXaMPle of a channel sHarinG selection PRocess is DescrIbed in thE commonly OWNed U.S. Pat. no. 5,886,988, eNtiTleD “CHannEl ASSIGNMENT ANd caLL AdMiSSION CoNTrOL FOR SpATiAL dIViSIoN mULTIPLE AcCESS COMmUnIcAtIoN SySTEMs,” The conteNtS of WhIch Are exPRessly IncorPoraTeD hEReiN by refeREnCE. when A nEw SubsCriBeR is adDed, a SHarIng deciSion is madE as TO whiCh CuRrent suBscriber is the BeSt match for PaIriNg with THE new subsCriber. The sequence includES an assiGnmEnt of The nEw subscriBer To the cHanNEl occuPied by The seLeCteD CUrrenT SUbScrIbEr, forming a BESt mAtch.
WHiLe spAtial chAnnels can be used to iNCreAse the traffic ManAged PER cEll STaTIon, ThE Use OF Spatial channels Also increaSeS ThE risk of calL QuaLiTy degraDation aNd eveN Call droP. ConventiOnal systeMs AssiGN New Users or exiSting useRs locatioNS for tRAnSmissIon ConsisTiNg oF a timE slot aND a fRequeNcy. EveRy TransmIssioN lOcation hAs a risk of interference asSociatEd witH it. conventioNal SYstEms manage ThesE risks by moNitOriNg varIouS CombiNatiONs Of tIMe sloTs anD Frequency TO eValUATe Which locatiON POseS the lEasT Risk of InteRference to both the BAsestation and tHe phONE. If The BAsesTaTion incorrectlY evAlUATes risk iT mIght assign a Call to a lOcATion tHat has A high lEvel of iNTErFErence CausIng PerformanCe pRoBLems or cAlL dROp. BaseStatIoNs currEntly mOVe caLLS around to differeNt
 a PS desiring to connectto the CSinclu des : ( 1)  the  PSsending a link chan nel establishment requ est o nt he s i gn aling  contro l  c h a nne l(S CCH ); (2 ) the  CS  respon ding to th e P Srequest by s e le cting a tr aff ic channel ( TCH ) andse ndi n g the  se lecte d TCHa s a li nk channe l( LCH) a s signmen t to  the  PS on the SCCH;( 3) the PS switchi ng toth e  a s s ign edLCH and tr an smitt i ng a se q ue n c e  of synchronizati on (SYNC) b u rst  signa ls  fo l lowedby ase q uen ce of idletraf fic burst s; and (4) upo n  succes sful d ete cti on o f  t he  sy nc h ron i za tio n  si gnal, th eCS  resp onds b y tran smi ttin g a s equence of SY NCburs t s o n the  LCHfoll ow ed by  a seq uence  o f idle trafficburs ts and th enpr oce ed ing t o  estab lis h a  connec tion wi t h t he i n co ming call to the C S, a nd  invokin g anya dd it i onal opt io nal  pro t o colsthat ma y be req uired( e. g.  encryp ti on and  u ser  au thent i cati on).
I n system s tha t  use SDMA tech n iques, the co n tr o l  s e quen ces  describedabov e  can  bem od ifi e d dep endin go nt he number of subscr ib ers be ing s erviced and t he numbero f channels  ava i la b le. For exampl e, if  a connect i on is so ughtto add a  subscrib e r  when th ere  ar e n o a v a il able channels ( i.e. ,all ava ila ble cha nne lsare  as si gned to s ubscribe rs ),  t he  se quenc e  may beau gme nt edto in c lude a  chan nelsh ar i ngselecti o np r oces s.  O ne e xam pl e ofa ch a nne l shari ng select ion proc es sis desc ribed in theco mmonly own ed  U. S. Pat . No. 5,88 6,988, entitled “CHANNE L  ASSIGN MEN T AND  CAL L ADMISSI ONCONTRO L F O R SPAT IAL DI VISIO NMUL T I PLE A C C ES S C OM MUNICATION S YST EMS,”  t he c ontents  of which are expr e ssl y incorporate d h erei n by  re f er e nce .W hen a  new subscriber  is added,  a sh aring deci s ion  i s madeas to w hichc urrentsubscribe r is thebe st m a t chfor pairin g with t he new su b scrib e r.  Theseq uencein clu des a n assi g nme nt of  the n ew  subsc riber  t o the ch annel occupied by the s electe d cur ren t subscri ber ,  fo rming a b estmatch.
Whi lespa tialcha n nelscanb euse d  to i ncre a se the tr a ff icm a na ged per cel l s tat ion,the use of  spa tial channels als o  increases the  ris k ofcal l  qua li ty degradation  an de v en calldr op. Convent ional sy st e ms as sign n ew use rs or e x i st i ng use rs l oca tions for  tr an s mission  c on s isting  ofatime s lot an d  a f r e quency. Every tr ansmi s s ion l o cat ion h as  a risk of i nterferenc e associate d with  it.  Conv entiona lsystem s m an age theser isks by m onito ring va ri ouscom binati onso f  time  slo ts  an d frequen c y  t o  e va l uat e wh ich l oc atio n poses t h e leastris k  of int er fer e n ce tob ot h the basest ati on an d the phone. If t h eb asest ationincorr ectly e v alu at es risk  it m ight assi gn a call toaloca tion tha thasahig hlevel of interf erence c ausing p e r forman cep robl e ms orca ll drop. Bas estat io n s curre n t lymove ca l lsaro und  todif fere n t
 a_PS desiring_to connect to the_CS includes:_(1)_the PS_sending_a link channel_establishment request on_the signaling control channel_(SCCH); (2) the_CS_responding to the PS request by selecting a traffic channel (TCH) and sending the_selected_TCH as_a_link_channel (LCH) assignment to the_PS on the SCCH; (3)_the PS_switching to the assigned LCH and transmitting a_sequence_of synchronization (SYNC)_burst signals followed by a sequence of idle traffic_bursts; and (4) upon successful detection_of the synchronization_signal,_the_CS responds by transmitting_a sequence of SYNC bursts on_the LCH followed by a sequence_of idle traffic bursts and then proceeding_to establish a connection with the_incoming call to the CS,_and invoking_any additional optional protocols that_may be required_(e.g. encryption_and user authentication).
In_systems that use SDMA techniques, the_control sequences described_above can be modified depending on_the_number of subscribers_being_serviced_and the_number of channels_available._For example,_if_a connection is sought to add_a_subscriber when there are no available channels_(i.e., all available channels_are_assigned to subscribers), the_sequence may be augmented to_include a channel sharing selection process._One example_of a_channel sharing selection process is described in the commonly owned U.S._Pat. No. 5,886,988, entitled “CHANNEL ASSIGNMENT_AND CALL ADMISSION CONTROL_FOR SPATIAL_DIVISION_MULTIPLE ACCESS COMMUNICATION_SYSTEMS,”_the contents_of which are expressly incorporated herein by_reference. When_a new subscriber is added, a_sharing decision is made_as_to which current subscriber is the_best match for pairing with the_new subscriber. The sequence includes_an_assignment_of the new subscriber to_the channel occupied by the selected_current subscriber, forming_a best match.
While spatial channels can be_used_to increase the traffic managed per_cell_station, the use of spatial channels_also_increases_the risk of call quality_degradation and even call drop. Conventional_systems assign new users or existing users locations for_transmission consisting of_a time slot and a_frequency._Every_transmission location has a risk of interference associated with it._Conventional systems_manage these risks_by monitoring various combinations of time slots and frequency to_evaluate which location poses the least risk_of interference to both the basestation and the phone. If the_basestation incorrectly evaluates risk it might assign a_call to a location that has a_high level of interference_causing_performance problems or call drop. Basestations currently_move_calls_around_to different