CA2059956C

CA2059956C - Mixed-mode transceiver system

Info

Publication number: CA2059956C
Application number: CA002059956A
Authority: CA
Inventors: Michael Peter Metroka; Joshua Peter Kiem
Original assignee: Motorola Inc
Current assignee: Motorola Mobility LLC
Priority date: 1991-02-11
Filing date: 1992-01-23
Publication date: 1996-11-19
Anticipated expiration: 2012-01-23
Also published as: GB2254523A; US5249302A; GB2254523B; GB9203072D0; CA2059956A1

Abstract

A radiotelephone system comprised of a radiotelephone-pair suitable intercoupled theretogether to permit transfer of data, such as NAM information, therebetween. A first of the radiotelephone-pair comprises a radiotelephone of conventional construction. A second radiotelephone of the radiotelephone-pair comprises a radiotelephone having circuitry to transmit efficiently an information signal upon a cellular, communication system of increased capacity. The data sequence contained in the first radiotelephone is transferred to the second radiotelephone to permit a communication link to be formed between the second radiotelephone and a cellular, communication network.

Description

MIXED-MODE TRA~ ;lv~;~ SYSTEM
B.. ~,~,.vu .d of the Invention The present invention relstes generaUy to wireless niPAti~n systemg, and, more particularly, to 8 mi~ed-mode 1,._.8~ . system for a " ' rl~ ~ pair which l~v per_its, ~ v~ of a ~ ~t:~n link with a fised station of the ~ ;rAI ~ system by the l. - of a code rnnt~inpd in either one of the ~ h~ A
the r~ lrph~nr pair.
A .-u ~ ; 61:on system which L~ol~uLo information IF, between two locations includes, at a minimllm, a L~ J
and a receiver inter~PonnPPtr~d by a i channel.
C~Annmt niPAtion between the; and the receiver is by L~ ' of the ;.. r.. -1: ., in the form of an inf~,rmat~n signal, upon the ~, channel.
In one type of r~ A~:on system, a radio c.. --..~ t nn system, the l. s channel is PI of a radio-r~ u_.-L~ channel which i~L~.~v~e_LO
the L.~,~l,iL~. and the receiver. To transmit an i.~r.,.... 1;~
8iF,nal (80 ' P 3 referred to as a baseband siEjnal) upon the :~ radio-r..;~uL -.r channel, the inf-----_l;o-- signal must be converted into a form suitable for i - thereof upon the radio-r. ~ channel.
Cvu~. .o.OI. of the infnrmnt;on signal (i.e., the baseband si~nal) into a signal suitable for Lr ' ' upon the radio-_.~ channel is ~ -- r~1-1;,.1-Pd by a process referred to as mr~dlllr~ n wherein the ;..f~....AI ~ ~ si,A,nal is i.. ~
upon a radio-r~e4ueu.~ LL.~ - ; r wave. The radio-r~ ue~ ele_L~ 1~, " ~ wave is of a r. ~ ~lu_... ~ of a value within a r~ nge of values of r. .~ which defines the i -2-

2~9956 radio-r._~lu .-. / channel. The radio-frequency aO t ~ wave i8 . ' ~ referred t;o as a carrier signal, and the radio-r .,~u_~./ .1~_1,._ -0 ^ wave, once mod1~1PtPd by the in7)rmPt-~.n signal, is referred to as a 5 ~ r,-,~ signal.
The infnrmAti.~n content of the resultant, ~r~dl1loter1, infnrmPtion gignal occupies a range of freqllPn~ A. centered at, or close to, the f.. qu_~/ of the carrier signal. Because the mn~ Pt~ infnrmPtinn signal _ay be ~ through lD free-space upon the radio-r ~ ~lu~ .-. / channel to transmit thereby the infnrmPtif~n content of the ;--r - -I n signal between the ~ and the receiver of the ---- system, the l.~ulh. and the receiver need t be poAitinnPd in close lJ~u~ly with one another.
Various mn~ Pti~.n 1~ A have been ~.. Iuu~d to modulate the ~Aul uaLu~l siOvnal upon the carrier siOnal to trans_it thereby the information signal upon the radio-r.~u ~ trPnAmiAA:~m channel. Such n.~dll~otinA.
t~ u~ include, but not by way of 1 ~ mr~itll~lP
:~ mnAll~Ptinn (AM), L~U,U .1~ / mndll~pti~n (FM), and phase m-~ At~on (PM).
The rece*er of the ~ ------ --: A~:~n system which receives the mA~ QtP~l infr~mAti~n signal l.A-- - -:l~.d upon the l. - channel contains circuitry to detect, or to 26 recreate OlLJ- ~' . the i,~u~ n signal. Typically, the circuitry of the receiver includes circuitry (8-J
g of several stages) to convert du..~ in frequency the received, ' ~Jo~l i.~.~liun signal. The process of ~Ptp~hng~ or .__.e ~ the ' signal is referred to 30 as domodl~oti~n, and such circuitry for p~rullL~Ing rlPmn~ P~ n is referred to as ~IPmn~ Qti~n circuitry.
A plurality of mn~ e d, information signals _ay be ~ tPnPoll~y l. ~ as long as the Ai~ ~
l~a~ ,r~ mn~ Qt~p~i~ information signals are cu~u,UI;~e~ of - 2 - ~"Aqf~R

`~ -

-3 -carrier signals of di~oo;milor r.~u_..ciP~, and the resultant, Od~ ;..r....~ ... gignaLg do not overlap in rr_~ue,~
A receiver includes tuning and other filter circuitry to pass only certain of the signals received by the receiver. Such 5 tuning and other filter circuitry form r.~ L~ p~ n~'-7 for passing signals, or ~ . .,nl. portions of signals, having r.~ within the 1 ' -' of such circuitry.
The broad ra~ge of r. equ_nci~ of which the carrier signal may be ~ p P-~ A and upon which the information 10 signal may be mnr'lllAtPh' is referred to as the ~ ..na~"Pt;~
rlG~u~ spectrum. Regulatory bodies have divided the elF_~ J~P~ol~ I-r r~GqU_ L~J spectrum into r~c~u_rL~.J bands; the r.~uG..~ J bands may be further divided into r, P~U_.-~.J
channels, such channels may, for esample, for n the ;L~ channels, as above-h'Por~iher7~ of a W ~ n system. Regu,ation of the; of ratio-frequency signa',s in certain of the rL..Iu- ..c~ bands of the Flæ_L., ~ r.~u_.n./ spectrum minimize ce between Rim~ A .F~ -- d, mn~ lAte~.
D information signals.
Portions of a 100 MHz r G~lu_...,~ band ~ E
between 800 MEIz and 900 .~IHz are a~L~Iocated in the U~ited States for, - - 1 i' - cr-"" ".~ n Ro~ t~' p}
n may, for esample, be rf. ~- ~t~l by a 2~ ' "1 ' ~ (or other l-r~CG:~. .) utilized in a cellu ar, system. A v l -,t- l- yh- -F is operative both to trans nit ant to reeeive ratio-r. ~u_..c~, mnhlllP~t,P~h ;--fr~ ...AI: ~ signals. Two-way ~. i8 pPrm;
between the ,~ and a remotely-loeated _UBCIC;~ G~ .
In genera'l, a ce'lu,ar, ~ ---.- - n;.A~;nn system is 7ed of a fi~ced ~ \--.. - ~A I ~n network which l-~Sl fil~ mr)r'l71~tPh' i.,roLL.~ati~,n signals to, and receives mndlllAt~Prl infrrmAti~n gignals from, rA~ h~nps The 36 fised" --....-- ..:~ n network ig created by po~iti~ning `"! ~

-4-uu~ base statiûns at spaced-apart lûcatiûns llu a g~ ~ , - 1 area. A base statiûn fûrms a fi~ed site which contains circuitry to receive mo~ ta~ nf~no~ion signals ~ by ûne, or many, ' ~ ' ~p'- and to transmit

5 n ,~A.Ilo~a~, infi~m~ot~f~n signals to the one, or many, - ' 't, '- -- Because both the fi~ced site formed of the base station and a .~ l;- t~ h --.-- permits both L.~ and reception of m~ t~ inforn~ot-~n signals, two-way . between a - ' ~, ~ - and a base station is 1~) F ' The base stations are clmnact~ad to a cû..~ livnal, wireline lvlop~vn~ system through switching centers.
The position at which each of the base stations of the cellular, c~nm~lnir~t;~n system is located is carefully selected 80 that at least one base station is within the reception ~5 range of a I l .~ .kn..t~ por;t;~ned at any location Iluuu~Lu..l. the ~ 1 area. Because of the spaced-apart nature of the p~ of the base stations, portions of the g_G~ }- 1 area l~uùu; l~uul which the base stations are located are - ' I with individual ones of the base stations. Portions of the ~_o~;~ u~Lcal area ro~:tj~nad p~v~uc~L~ to each of the spaced-apart base stations define "cells" wherein a plurality of cells, each ~ with a base station, together form the ,~ area , - ~ ' by the cellular"~mmllnir~hon system. A
26 - ' '~ ,* e ~ 1 within the ~ of any of the cells of the cellular, ~,- .. ~; ~ :on system may transmit, and receive, --~vl..l-ln~, inf~mot;~n signals to, and from, at least one base station.
R- - h~, ~ -- utilized in such a cellular, 30 ~ system are of many varied tu.-..l-u.,lions.
One ~-- u~liù~ of . - ' ~' ~, referred to ge~erically as a mobile ' ' '~ -, is affised in position in a vehicle, such as an ol~tnm~hils AffiYPfirln of the mobile - ' ~t, ' - in the vehicle i8 adv-ont~eo1~ for the reason 4 f~ R

20~9956 that the power required for operation of the mobile , ' ^ may be supplied by the vehicular power supply. Therefore, the mobile ~ ^ may be operated at relatively high power levels to increase the ~ o-:-^,n 5 range, and reception range, of mn~ d, in~^~n~tion signals L~ i by the mobile .~ However, because the mobile I~ is affixed in position within the vehicle, pu~ y of the mobile ~ ' - is minimal in some CUIIDtl u~ions, arld in other co~t~ u~ LU~AO~ although0 p~ E of removal from the vehicle, the portability of the is limited due to the generally large physical size of the mobile I ~ , L -, Further, because the mobile '~ ~ - is powered by the vehicular power supply when affixed to the vehicle, S l ~F~u- ~l to removal of the 15 mobile rrf~ t~ from the vehicle, ar~ alternate source of power is required to permit operation of the mobile ra~ t~ .h.~"~^
Portable I-Lu~ are of c~rOLu~lio--s to permit . u.,~c~ L carriage by a user. To permit such portability, a 20 portable power supply (e.g., a battery pack) is affi~ed to the portable " ', ~ - to power the portable thereby. Because the portable power supply stores only a f~nite amount of energy, the time period during which the portable may be powered is limited. Once the stored 25 energy of a portable power supply is depletet beneath a .-- .. ---- ..~ level, the supply must be replaced with another portable power supply to permit ^nntin~d operation of the portable ~ e~
To increase the length of time during which the 30 portable ~ A~l;-J~ -- n may be powered by a single portable power supply, attempts are made to minimize the power level at which the portable . li: 1 p~ - is operated, and generally, the --~ -- power level at which the portable r~diot~ll pl~ may be operated is less than the ~
~ R

-6-205~956 power level at which the mobile _ ' L' 1 . L' - - may be operated. The .~ ; . ant reception range of 8 portable ,_ ~ - is, therefore, generally less than the ~ and reception range of a mobile 5r~ t~l r ~
It may be dUscerned that ' - ', ' - are constructed to optimize certain design ~r O.
0~ ;v~ of certain of the design r - D prevents v~t ~ t;~., of other of the design ~ D. For instance, lAv a portable r~ .1"~ design optimizes the physical .1;" .~ thereof to increase thereby the portability of the device. The .~ output power of such a portable ' ~1 ,'- - csnnot be oFt;~i7~A~ as the size of the power supply would be too large. Cu~ i. O~ ly, a moWe may be cul.Dlr.,~ t~.d to ma~cimize op- ,-t~
power output levels as a mobile " ', ' - generally need not optimize size p ~.~-.. t~, D.
In the past, therefore, careful ~ . of the intended use of the " .1;.~1.1. ~.t.. ~ was required to ensure that 2D the r~Ai-~ h- -- .r was of a cvl,sl- u~on which v~ ~.i. uLed desired ones of the design p- ~ - t -- D.
The need of a user -~ ly to utiUze a mobile - in which certain ones of the design 0 are v~ A and a portable _' L~" ' -- in which other ones of the design Pal~ D are v~ti...: r~ in some instances requires the user to purchase both a mobile 1~ ' - and a portable r~liotpl ,'- - In the past, when a user required both a mobile .~ l,...,r and a portable _ '-L' ~ e, payment of an accesD fee was 3D required to provide each of the ._ " Jt ~1)~ - with dUstinct access codes to permit each of the . ' ' ,)~ -- to access the ~ - .. : A~ n network (i.e., the fi~red sites ~ . iRed of the spaced-apart base stations) of the cellular, system. Even when Rimlllt~nPoll~ u8e of the two t~l"~I.. P~
ff (~ anR

was not ~ or desi~ed, the user wss r~e9qu9ir5d to obtain such access codes for each ~ ~, hnne Disclosed in co-pendir~g Csnadiar~ " serial no. 574,300, filed on August I0, 1988, by Michael P. Metroka, co-inventor of 5 the present invention, i8 a radio &~ s rt in which two separate ~ ,.t","~ are i~ .- u~ . 'e(' such that an access code, required to fûrm the ~ Iink with the ~ - .;- -1: network, c~ntoinpd in one of the 'ephnnR~ may be L-~..c~ to the other of tbe 10 r~o,f~ , L to permit the other of the . ~ L to form a C~ .. AI ~J-- Iink with the L~ :0n network.
Such an ~ "L' ~ ~ t is al~ b 0"- as a user is required tû
obtain only one access code, and, hence, pay oDly one access fee, but is still able to utilize both of the ~
~5 As an e~cample, a user having both a mobile , e-1;~ t- 1- ,..'.~...~ and a portable ' ~ may pay an access fee to provide the portable ' ~ - with an access code to permit thereby the portable l~ l;-)t 1- I-h~ to form a cr~mmlln;rQt;orl link with the romm~ln;~At;on network.
2~ By i~ .cuu~lL~g the portable r.o~t;r,t~,' - c~ e the access code with the mobile r ' ' ~ . the access code contained in the portable I d '- L ~ may be ~ . ", 1 to the mobile l.--l:r,t~ L~ .P- The access code I " c~ to the mobile ' "~' - may be utilized by the moWe 26 ~d:: '(, ' - to form a c~ -. Iirlk with the ........... -~ ~ - n~twork. One such . ' ~
~" ""b- -- -~ ~t is the 9800XL e~ctented system sold by Motorola, Inc. The access code contained in one of the .~
is cu...~..tio~ contained (but not by of ~ ) in the 30 portable ,_1..,~1 ~1-----~ as, once the user e~its the vehicle in which the mobile _ ' ~t ' ~, '1( - is affi~ced, the portable l rt;.~ .h~...P may be carried by the user and then thereafter be utilized to form a ~-- - . -.:rA~ - Iink with the c - ........ r~l:on network to cnm nlln;r~tD ~L3~c'L-u~ gh.

IncreaQed usage of cellular, c- .. --.;- A~ l systems has resulted, in many i~ton~oQ in the full lltili~ot;,~n of every available ~- channel of the r.~;qu_~ band allocated for cellular, roAAi l~ I,io - As a re,sult, various ideas have been proposed to utilize more o ~iw~ the r. ~u ~ band allocated for iotel ~
.-- .. :~ Al:~nQ More efficient 11ffli70t;on of the frequency band allocated for ra~ L - ~. increases the llA~ I capacity of a cellular,; ~ ~;on IC system.
One such manner by which the tran~mil - capacity of the cellular, ~ -- -- - ..;- Ai r~n system may b~ increased is to utilize a digital, or other discrete, ~ technique.
When an i. fu.lnALiu.. signal is converted into discrete form, a 15 sin~le l ~ -n channel may be utilized to transmit, I -lly, more than one signal. Because more than one i~fu.~liun signal may be ~ ed upon a single /m channel, the ~ capacity of an e_isting r.e~u~ band may be increased by a multiple of two ZD or more.
Another such manner by which the ~.
eapaeity of the cellular, C~ ll;rA~ system may be i lWA -- ~ is to retuce the bandwidth of each i channel upon which the mrrilll_t~r~i, ;--f,-.---l -. signal is 25 L. ' &ch a reduetion in the ~ ;d~l- allocated for eaeh tA - chennel, of course, requires the bandwidth of the ~ tllnt~f . infr mot;on signal to be ~ ly redueed. For eA~ample, by reducing the ~d~;lLh of each of the i channels of the allocated r..;~ ~ band by 30 a factor of two, the ~ --, capacity of an e~isting r. c~lu~ band may be increased by a multiple of two.
RP~illrt;~n in the ~- n~;llL of the ~ n channels by other mlll 1~. of course, results in a similar, Cull., increase in I,IA--A---;F-' ..~ capacity.
- 8 - ~ 90R

~9- 2059956 Adoption of arly of the a~ ...rd ideas for 8~ ., capacity of an e~isting, cellular system would require use of a ' - 1~,* - w~D~-u. L~--capable of ~ sLil~& mnd~ ' r ~'- signals wL~ich 5 _ay be l~ , d upon such a system of increased capacity.
For instance, lltili70ti -n of a digital, or other discrete, mn-llllQtion l.~ hl,iq.-e would require a rat~ !rL - capable of forming a discretely-encoded, mndlllotPrl infr~rrnatinn signal. Similarly, llt,ili7AAt;-~r. of a ~du~ ,L '.~;dth, lD mn-llllotion t.. ' .. - would require a .~ capable of forming a IT n~llllstP~l i.-~.,". ti-,, signal of the reduced bandwidth.
The great m~ority of e~isting ': ' . ' are of ',lu~lions which permit l~ An of n~n~ ot~Pd 15 informoti~n signals upo~ esisting cellular, cnmmllni~o~ti systems. Such e~isting ra~lir,f~ - do not generate rnA/3ll19tD~ gignals capable of ~_.._.dl illg the signals, as above-~Ps~rihe~l required to utilize r ~
proposed, cellular ~..- - ..,...:.At:,m systems of increased capacity. Therefore, to obtain benefit of the increased capacity of proposed, cellular, rnrnmllnir~otinn systems, purchase of - 1 ~, ~ of new design would be required.
To per~nit c- --I;n Pd u8e of e~i8ting . 1:./~ h....
~. 1 ' - 9~ systems proposed to ' any of the 25 ~~ ._ --~- ~: --.~1 ideaD permit both use of 1l~: le~ e - of e~isting design as well as ' r - of designs ~ g al~Anl~6~ 0 .a lltili70tir.r, of the system~ of increaged capacity. Ro~
constructions of e~Listing design are still, and would remain, 3~ quite ^ -' and operable in such systems of increased ~apacity. ~ it;~n~lly, in many ina~AnrPR the ~ ln channels of the ~i~qu~ .1 band allocated for cellular, ~-sdir~t~l ~' - ~ ----.--....: Al:on are f~llly utilized during only certain periods of the day (for esample, during morning and 9- (~ r~ql R, -10- 2~)~9956 evening rush hour time periods). Further, only certain, ceUular systems, generally those located at, or close to, certain urban centers, have reached such full lltili7PI;~n of the e~isting r.~lu~ band. In short, even with the il~l,ruduLliu 5 of such systems of increased capacity, wu~.L~ u. liulls ûf e~isting design wiU stiU be quite useful.
Therefûre, because l 1d~ of e~cisting cù..sl.u.Liuu may be utilized even ~C ~h~equPnt to fl~ tl'/''. of ceUular systerns of increased capacity, lltili7ott~n of 8uch rPAi~ p h..-~P~ of e~isting design will certainly continue. However, such ~v-~ i use of rrliut~1 ~.hAno ~u..oLIu, ~iolls of e~isting design wûuld not permit advont~geouc lltili70t;r~n of the ^~
. capacity of a cellular, f~ n system of increased capacity. What is needed, therefore, is a system which perrnits a . ~.L : ~r ' ~ ~ u~ lion of e~isting design to utilize the features of a ceUular,:
system of increased capacity at minimal cost.
SUIIILU~ of the Invention The present invention ~.<~ provides a system for U~bl ' 12 a r~o-~liAt~ - of e~isting co~.OL. uclion.
The present invention further al. ., ,~ly provides a mi~ced-mode ~. .s~ _. system having at least two L~3~ o iut~ ., ' - I tlle.~i ub_~l.er of which one of the L~O._ ~_.D may be cu~ u~;o~.d of a .~
u~lion of conventional design, and a second of the ll~u~a~ O may be ~;u~ c~ of a raAtiotP1PFhonf~
construction of a design capable of r.l~ ly utilizing the tlflAittrns~ L--~ A capacity of a cellular, ~rnnnn-~ni~ti~n system of increased capacity.
- 10~ qllR

20599~6 The present invention still further Adv~ 6..o..f.ly provides a method for l~ r~g in~ot~r~n siA~nal8 in either of at least a fir3t L - mode, or a second tr-n~ mode to a . : network.
In ~ . . 2 with the present invention, therefore, a mi~ed-mode L~_~3ce;~.,. sy3tem operable on a ~ n network having at least one fi~ced site capable of receiving and tr-n~---;l I :..g in~rnAotirn si~nals of at least first and second L ' ~ modes is disclosed. 'lAhe l._,3~:~_. syst2m is lD ~lnrri~ed of at least two l~~S1G t_~O wherein a fir3t l~ _ L_c;~ ~. of the at lea3t two l~ _. O is operable to transmit i~.~Lol, si6nals in the first l.~ n mode and a second L. d.,.7 ~e. of the at least two l~_~ôc~ _. o is operable to transmit ;.~r~ ; - sihnals in the second 15 L ~ . mode. At least one of the first and second 3~G ~6~o contain3 a code ~vhich, when ~,A-- ;Il- d to a f~ed site of the ~;.- - ..--.. A l ~ network, causes a --- .. ~-~:,,-. link to be created therewith. ~lAhe fir3t , and the second L,~3~ _. are ~ to tran3fer the code provided to the ~nn~lnllnicAtir~n network from the first ~ . to the second l~s~G;~e~ when the code is rontoinPd in the fir3t Lr~ .,. to tran3mit the code in the second l mode. The code is transferred from the second l-~ .ce;~G. to the fir3t t~_~S~G ~ when the ~; code is rontoinPd in the second ~13~ . to transmit the code in the first ~. - mode.
Brief D~;,u~iu~ of the Drawings 30 The present invention will be better .. -A~ ,od when read in light of the a~ .~i"g drawings in which:
FIG. 1 is a partial block, partial O l.~ .. ntir diaAram of a cellular, cn nm~mirot;rn system illu3trating the p~sit~inninE of -11- C~-~ R

-12. 2059956 a mobile r~liot~ls~( ^ and a portable ra~ t~lc"llvlle .uAiln~L~s to a fi~ed site c --~ 5 a base station;
FIG. 2 is a block disgram of a, '~ ^ of which either the mobile ra~liotPIPrhonP or the portable 5 1 ~ ~ ~ of FIG. 1 may be cv...~u. ~;
FIG. 3 is a partial ~ , partial block diagram of two r~ .h~ t~,.. , ' ~ according to the teachings of tbe present iu~cnLull;
FIG. 4 is a block diagram showine in greater detail the lD hlh.cuul.lill~ of the rS~ tr~ .I,....r3 of FIG. 3 according to the present invention;
FIG. 5 is a partial block, partial circuit diagram illu"l~ g the i~L.,..,vul,ling between the ,~ ;--t~ hr~ s of FIG. 3 according to a preferred ~ o-l;.- ~ ~l of the present 15 invention; and FIG. 6 is a flow diagra_ listing the method steps of the method of the present invention.
Ds~ . of the Preferred li~mhorlimPnt Referring first to the partiat block, partial ~- I, -.AI
ill..-~ ,~1: ... of FIG. 1, the elements of a cellular ' - system are shown. As described ~IC.iUU~ly, the cellular, ~.. :. ~ r~n system is for_ed of a plurality of5 fised-sites c~rri~ine base stations which are p~-:l :- rd at i- locations throughout a lscvt ~Al,kical area. The plurality of base stations together comprise a portion of a fised,; ' network, referred to generally by reference numeral 100, comprising elements at the left-hand 30 side portion of the fieure as defined by line 106, shown in hatch. A plurality of f~sed-sites forming base stations 112 are poAih~mPd at spaced-apart locations Ll~uu~;l.vuL a 1 area. W~ile two of such base stations 112 are illustrated in FIG. 1, it is to be ul~d_. .,Lood that the system of o 20599~6 the present invention is operative to rr~mmllnir~ Ite with a single base station 112 formed of a fi~ed-site, or, typically, a large number of base stations 112. As indicated in the figure, each base station 112 ~ n~ a L- ~ portion 116, 5 receiver portion 120, and antenna 124. Each base station 112 is c ".r- t~d by a hard-line C~nnPcti^n indicated by lines 130, to a 8~,;1A h;ng center; such switching center i8 referred to in a cellular, ~.... ,:~,4l:r~n system as a master cellular switch center (MCSC), indicated by the figure by block 136. MCSC 136 10 is, in turn, cr~nn~Pct~Pd by hard-line ~r~.",r~ indicated by lines 142, to a conventional telephone network, as ~,v.~.,lc~
by central office block 148. The conventional telephone network further cu~,u~;s~3 hard-line c~nnPct;~n~, such as indicated by line 154, to conventional, wireline l 1. l.h.~r r 1, 15 such as 1~ v..~ 160.
A rarliqtalpFhnnp~ such as portable ,_ ~ ~rL - 166 or mobile .~ l.. t- 1. ~.L.. r 172 affi.~ed within R~ltAm^l~ile 178 may transmit mr~r~lllatPr~, ;..r. - ...-~ ~,.. signals to the receiver portions 120 of a base station 112 when po~ -.. d PLU~ e 2~ thereto, and may similarly receive m~ llat~ information signals ~ by a L.~.,~i~l~L portion 116 of a base station 112. A - ' 1 d, inf)rma~'r~n signal 1 1 by one of the, ~- 1 r~ . such as portable, ~
166, once received by a base station 112 may be routed through 25 the ~ ~ network 100 to, for e~ample, wireline i ', ' - 160, or another .~ , such as mobile ' , ' - 172 affi~ed within ~ . I -- "r~ 178.
Turning now to the block diagram of FM. 2, a L,~c~ . (here, more particularb, a ~ rl;,.~ .h...,r), 30 referred to generally by reference numeral 200, of which a " ' 1~, ' such as portable rq.~ t ' ~ 166 or mobile - 172 of FIG. 1 may be ~ is shown.
More particularly, ~ ,6 ~ 200 is of a cu~ u~ion pPrmitt;ng reception and l,...~ -. of signals upon either -13- ~ qOR

a ce'lu'.ar, ~^nmm~lni~^at;nn system of Cu.lv~ .lt onsl bandwidth or of reduced baldwidtll, and is illustrated for purpo6es of e~ample on'.y Such a l ~ u8 ~ o~ is referred to as being of a "dua'.-mode" construction. Other t.~e~ _. cull~ u~ l-ons 5 may, of course, be u~ed in the sy6tem of the present invention For instance, a l.~ r.c~;-_. construction operative to receive and to generate Ls~ . ~ ~1y-encoded signals comprise _any of the elements of l.~s~ _. 200 of FIG. 2. r~ and da7nnr~1l1atio71 circuitry woult, however, differ c~ "~ e 10 to the mnfllllation-type (i.e., l.~ mode) of the signa'.
to be l.~ ,?~ and received by the l-~..~:~_. The actua' circuit~y embody-ing the filnr7i~^^al blocl~s of the diagram may be disposed upon one or more circuit boards and housed within a ~uu~ LullFl rafl;otal p!7- ~ housing A signa'; ' ~ by a base station, 8UCLLI as a base station 112 of FIG. 1, and l~ l.d in FIG 2 by t.&~
204, is received by a ~ 7 r L ~ antenna 208. Antenna 208 supp.ies the received signa'. on .ine 210 to filter 212. Filter 212 is preferably a very wideband filter having a passband to pass 6igna'l portions of a received signal within a desired î~
range Filter 212 generates a fi.tered signa' on ~ine 216 which i8 supplied to mi~cer 220. Mi~er 220 ad~ lly receives an 7tin~ 6igna' on line 224 6 ~ d by osci.'ator 228.
Oscillator 228 ~ , for_s a portion of a c u.-~ liullal 25 phase loc,ced loop tnot shown) having a L~q~ Of n~7rillAti^n contro'.led by a reference osci--ator (not show l) and a L_~ divider, such as a P~u6 ^ n Ahl^ l7y~ si.._. (a'so not shown). Mi~er 220 generates a down-converted signa' (common',y referred to as a first; .l, ^ I at~ r~6~u .1~ i.e., 30 IF, signal) on .ine 232. T.le down-converted signa' ,_.1_.~ll 1 on line 232 is supplied to filter 236. Fi'.ter 236 is p~f~ 'bly a bandpass filter, such as a mnnnlithir crysta' wideband filter, and is CUL11111ULL7LY referred to as the first intermediate frequency, i e, IF, filter.

-15- 20599~6 ESlter 236 generates a filtered signal on line 240 which i9 supplied to ampliffer 244. A npliffer 244 generates an amplified signal on line 248 which is supplied to second mi:~er 252. Line 256 i8 also coupled to mixer 252 to supply an 5 ~ tine 8igr~al gPn~Pr~ted by ogcillator 260 thereto. Similar to oscillator 228, the '~lofir~n rr_~lu_.~ of oscillator 260 is locked into a known rl~,4u .~,J rPI-ti~n~hir with a reference oscillator (not shown).
~cer 252 generates a mixed signal on line 264 wbich is 10 supplied to switching circuit 268. Swi~.,hhlg circuit 268 may, for example, be ~ of an integrated circuit switch.
S~ ng circuit 268 o~ y connects line 264 to lines 272 or 276. Line 272 is coupled to filter 280 of a first ~ ~lw;dlll, and line 276 is coupled to filter 284 of a second ' ~ w;llh. The 15 mi~ed signal 6-.~ d by miser 252 on line 264 is filtered by either fflter 280 or filter 284 l6_~r ~.~ to pfi~ of the switch of switching circuit 268. When the switch of switcbing circuit 268 connects line 264 and 272, a filtered signal i8 6~ led by filter 280 on line 288. When the switch of :~ switching circuit 268 is pnn:ti~nPd to connect lines 264 and 276, filter 284 generates a filtered signal on line 292.
Line 288 is coupled to ~I.lirl_~Ai~Ler 296 which g~Pnpro-tp~ an amplified gignal on line 300 when a filtered signal is supplied to ~l;r~ hl~ 296 on line 288.
2~ Similarly, line 292 is coupled to amplifierAimiter 304 which b~n ~t~3 an amplified si6nal line 308 when a filtered signal is ~upplied to the amplif.~.A,..~il_. 304 on line 292. Lines 300 and 308 are coupled to switching circuit 312 which, similar to ;l~llillg circuit 268 is ~f~,.~ly ~ n?d of an ' ~ ~1 ~0 circuit switch. ~ Li~ g circuit 312 operates in the manner similar to switching circuit 268 ~ I, Iy to connect Une 300 or 308 to line 316. Line 316 is coupled to rlPmnA~ tnr circuit 320 which ~1~ r~ l'' . the signal suppUed thereto and -15 - ~;r.-h~

5~enerates a APmnAlllotPd signal on line 324 which is supplied to the L.~.slu.~,., such as speaker 330.
In a l~ Oi! construction which is of a .u,-~euLo.lal desi~n, switching circuits 268 and 312 are not required as line 5 264 is directly ~nnPctPd to filter 280 and amplie.11. u.Lc~ 296 is directly ~ t~ d to ~lPmnA~ tAr circuit 320, and the parallel filter-~u~LL~ b. 284-304 line is not utilized.
The bottom portion of the block diagram of FIG. 2 further illustrates a transmit portion of the r-~iqtelP~hqnP
10 200. As the trans_it portion is conventional in nature (e~cept for the mndlll~tor portion thereof which is of a . ul,~LIu, L.on particular to the type of modlllotPA information signal to be L. --~ bythe ' ~ , i.e., the desired L mode in which the, ~ is to be 15 opProtPA)~ a detailed Ar~ of operation thereof is omitted, but review of the figure shows the transmit portion to include u-~.ul,hu.~e 350 which supplies electrical signals to mnAlllotor 356. As ... ~ rd ~l_.cul~u._, ~ 356 is of a ~u..b~-u~Lion specific to the L._ mode in which 20 the ,~ h F is to be operated. Oscillator 362 suppliês an tine signal to mnAlll 356; a si6nal ~O~ d by mndlllotor 356 i8 gupplied to miser 368. Mi~er 368 mises the signal supplied thereto by ~ v, 356 with an - llot;nLr signal, and ~ a mised signal which is supplied, in 26 turn, to filter 372, esciter 378, amplifier 382, d.- - 1 coupler 386, and filter 392. Filters 392 and 212 may together fûrm a dupleser.
Output power of a si6~nal g_..~ e~ by ' L ', '- -200 is controlled by power control unit 396 which is provided ~0 input signals 6' '- ~-t~d by RF dêtector 400 on line 404. While t shown, control si~rnals may ~Id l~ lly be applied to detector 400 and/or power control unit 396.

2059 9,~6 Turning now to the partial srhF~m7~, partial block diagram of FIG. 3, two ~ ' ~ are -~
7_:1~_. to form a ~ h~ A pair, referred to byreference numeral 420. By suitably illlc,.,u~uL~g two 5 ~ hnn~7A7 lL_.etuc7_th,., a dats set forming a code (i.e., the access code ~ t~ Fd hereinsbove) t ' ' 7d in one of the .~ .h~ which, when; _ F "~ to a base station permits fr~Am~ of a rnmn~ rll Iink t~ _n, may be; r cd to the other rP~i~)t ~?~ L ûf the 10 .l~J~t ~ pair420. Therefore,~Li' ' ,' ~ pair420is formed of first ~.l;.J~ c 426, here a portable ,.h~ gimilgr to portable r~intrl, ~( - 166 of FIG.
1, and second l_rl..~ , h ....~ 432, here a mobile " t 1 ,~ - similar to mobile l_ l:n~ hr...~ 172 of FIG. 1.
15 Line 436, cAl, .lL-.g from ~ l "h ~ F 426, and line 440, ~ 1 ."l;..g from . " ' 'e~ 432, are coupled II._.~,'u~,~,tl-er by ~ " ,~ ~ I . .. A 444.
FIG. 3 further ill cllcs periphersl devices coupled to ~ - 1 ,)~ - 432 such 88 handset 448, speaker 452, and ~c.uphu..e 456. Power supply 460 is coupled to rl ~ 432topowerthe,_.1; ~ 1 "h--Fthereby. Ina preferred P-~hG~ t of the present invention, when ~_r~ .l,n.~n 426 i8 .--t_.cù,, 1 ~ with ,_ ' ~ ' ? 432 by F_~ 444, suitable ~.J....F~ are made between power 2j supply460and ~d:n: ' p~- e426topermit " ' ' 426 to bc- powered by battery supply 460.
The data set forming the code contained in one of the ', ' may be contained in either first ": 1~' - 426 or second l_~1; "~ ...F 432, or in both 30 first rl7~ l-, l.- F 426 and second 1--l:r~ -- F 432. When the data set forming the code is contained in both first ,.h---.F 426 and second r~7-~lint~7lt7Fhr7rip 432, the " ' ~~.~' ~ ~ 426 and 432 may be ~ operated with no r~nn~7ctirn th~ . Int_.~uu~,li..g of the first and - 17 - CE0029( R

second . ~ t 1- I,k- ~ 426 and 432 according to the present invention may be still .1~ 1y utilized even when dsta sets forming distinct codes are contained in both rr~li.~t ~ 3l ~ ~~ 426 and 432. For esample. the data set 5 forming the code cnnr~inP~ in one of the ' ' r~ ~ ~ may be l ~ rO~ to the other of the . ' ' ~' ~f to form the cnnnm--nir8tinn link with the, -- ....~ - At:on network for purposes of billing the resultant l~r to one or an other billing account de_ned according to the data set forming ID the code.
The data set forming the code, which, when 1 permits fo~ un of the rnmm~lnir~ n link between the ~n nmllnics~tinn network and the " '~ ' 31 ' is p.~f~.~.bly, as is conventional, c- ---~ d of number module (NAM) data. NAM data includes, for esample, data ~e ,. 3r forming phone numbers, system ntifi^^~inn numbers, system channel scan data, and - serial numbers.
L~Lo~uu~ gOftwo " ' ,~ - topermittransfer 2D of the data set Ll-~ 3~ is particularly &d~ ' ~ for the reason that a ~ of col~.,nLiù~lal design may be i..l~ d with a .~-l: )te~ AnF of a dasi~n p~ "g fnrmofinn Of mn~t~ t~od inf~rm^~ûn signals ~_ColJ~ for )"~ lltili70t;~n of the features of a cellular, system of increased capacity. With reference to FIG. 3, for e~ample, first .~ - 426 may be l of a portable . ~ ? Of cV~-~OnLiu~
' ucLiun, and the data set may be rnnt~inltd within '- ' ~r ~ ~ 426. Second " '~ "l ' ~ 432 may be 30 r..."~ el of a mobile .~ -,t~ .... F of a cu..s~ u~,Liuu E L- ' ' of infnrml~tinn signals capable of such a1v~.~L~ 3 lltili7flhnn of a cellular, ~ Ation system of increasOd capacity. When a user desires to transmit information in a i nn mode capable of utilizing the -18- 1~ 9qOR

205~56 increased tranqmi! capacity of a cellular, c~ .. ~.:~ vtinn system of increased capacity, the portable ~ is ~u., 1 - d, as shown, with mobile r~ 432, the data set contained within rP~ ,t~ f 426 is L. ~ .dd to mobile rP~lintr~ 432 from ....... I;-~ 426, and the ~nnnmllnirPtinn link with the ~ v ~ o. network is formed by Ll of the data set from rP~;ot~?rhnnP
432 to a base station of the ~ .. :~.~t --- network.
~q p~,.ivu~l~ mPntinnP~, a cellular 10 system may be utilized at full capacity during only certai~
portiûns of the day, such as during morning and evening rush hour periods. The portable . ~.1:." 11 I-I-----r 426 may be ly opersted during most of the day, and inL ~, , ~d with mobile .A-1; ~ .h~ r 432 during those ~5 periods of the day in which the cellular ~ . ~.. .: ~ l i -- .
system is fully utilized to make use of the nArl;l ---Al capacity of a cellular, .. ;~AI;nn system of such increased capacity. Because the data set forming the cûde is contained in the portable ~ , L- - 426, the portable ,~ .hr~
20 is capable of i--~ rl- .t operation during all hours. During rush hour periods in which llti7i~7At;~ n of the ~d~it;~
LIA.. -:~ ~ . capacity of a cellular, r.. --.. rAli~n system may be r~ , the user may il~L~ u~ the portable ": ' ~.~ ' ^ 426 with the mobile ,- l.- t 1. ~kri ~n 432. The 2i data set r~ntPinPd within ra~lint~l ,' ^ 426 may be b " I.,d to mobile rP~ 432, and, ~ , L-432 may be utilized to form the cnmmllnirP~ n link with the cn~nmvnirAAtion network.
Turning now to the partial block, partial qrhPmptic 30 illu~LI~LiGu of FIG. 4, the i-~L~ ,u,uli.-g between portions of first . -' L '~, h~ - 426 (in~lirAtpd by the block shown in hatch at the right-hand side portion of the Figure) and second L 1 ,~ - ^ 432 (indicated by the block shown in hatch at the left-hand side portion of the Figure) of ._ ' ' '~ pair - 19 - ( :1':1)9~ ~

420 of FIG. 3 is shown in greater dei~. Connector 444 couples data lines 436A, 436B, and 436C of ' -', ' ~ 426 with data lines 440A, 440B, and 440C of rtl~iiot~PlPphon~P 432. Pr~f~ bly, connector 444 forms a plug 5 connector formed of mated pin l..--...F~I... A disposed at ends of each of the data lines 436A-C and 440A-C. When suitably .. u, '~ t~ lines 436A-C and 440A-C for n a bu~ ilLt~ F~ g processor 426A of first ~L e 426 and prûcessor 432A of second ~ ~I L - 432 The bus lD formed therefrom msy be operative to transfer data according to the protocol disclosed in U.S Patent Nos. 4,369,516 and 4,654,655 The resu'itant line formed of lines 436A-440A may thereby for~n a "true" (T) line; the resultant line formPd of lines 436B-440B may thereby forrn a " ' " (C) line;
15 and the resultant line for ned of lines 436C-440C may thereby form a "return" line (R). Altr~ a single line bus may be formed according to the protocol disclosed in U S. Patent No.
4,972,432 to Gregory P. Wilson et al; such single line bus is referred to as a serial ~ interface (SCI) bus, in Z` which the single line, such as the a.L,v~l d~fill~d R line, is utilized to transmit data to . ~ ' L ' ~ 3. ' ' - 426 from " v ' ~' - 432, and to transmit data to ~ 4 L - 432 from .~1;AI~ 426.
Memory element 426B is coupled to processor 426A, and 2~; memory element 432B is coupled to processor 432A. Mery elements 426B and 432B store al~;v~ .v1....8 which are ~ '- by ~.v~ o.~ 426A and 432A, .,~ ly, and at least one of elements 426B and 432B stores the data sPquence forming a code, such as the arv.~ I;nn~Pd-NAM
3~ inf~rmtltinn, which, when v. ~ to a base station, permits a ~ nn lfilk to be formed vl~
Further i~ o~Ptpd in the Figure are mo~llll~tnr8 426C and 432C which are coupled to pLV~ L~ 426A and 432A, ly. Mnd~ tLors 426C and 432C generate mn~ ltlt~p~l 36 inforrn~ti~n signa'ls by a desired mn~ ti~n v~ u_ which - 20 - (~ R

-21- 20599~6 are e_itted by antennas 426D and 432D over a desired "; 'r)n channel.
Accorting to a preferred ~ ..ho~ - - .t of the pre6ent invention, rs~ h~ r 426 r~ a portable 5 ~ l ~rhnnP of conventional t u~ Lu~ (i.e., the lPrh~nP generates an analog, G~ u_ s~.~ mn~ tPd signal of nûrmal Lu~dn~;dllt according to a conventional G~:u~u_.~ mn~tllo~i^n i~ P. referred to h_..,:..b~h,..
simply by the term "analog" tc_Luiu~ua) and L'~ rt_ _ 10 432 c~ a mobile rp~j~t~l. ~l.---.~ capable of ~ .LIlg m~ tPrl~ information signals capable of utilizing the ,,,,cr:~n capacity of a cellular, c~ nn system of increased capacity. A~v~di~ ly~ mndlllstt~r 432C generates a mn~--1OtPd signal according to a degired mn~.llrtinn , such as a discrete-m~dlll~t;nn l_.,luuu,u~ (e.g., a Time Division Multiple Access, TDMA, b:~h -~ , or a Code Division Multiple Access, CDMA, technique), or a reduced-bandwidth analog mndlllstt;nn ~ -..:-lu~ (referred to hereinbelow as an "analog split channel" l~- h..:.l..P). As ~ -lintPlPrhnnP ( u~ lu~ liulls capable of ",_.I~.,.L lg such m~ tPtl inft~rm~t;on signals typically are further capable of ~ the analog, FM signals of c~ _..Liunal bandwidth (i.e., "analûg"), such rS~ tel~Prh~)nP constructions are usually referred to as "dual-mode~ r~3rli~ 1 L __ a5R~ ? may also be u~i,- u~ to generate three different forms of mndlllot~P~l i.. ~.. -~:-> ~ signals, referred to as "tri-mode" TP~ir.trl, 1 as well as a plurality of different forms of mnrl~ tprl~ in~nrm~tion signals, referred to as "multi-mode" rS~ intr~l~, L- _ _ The following lists several of the many ,t ~ :^nc of mnrllllotP,l i.. r.. ~ .. Bignals which may be t~ t~d by Ts~rli.J~ h~mr circuitry of various .c.dit.' 1, ~ iOnS: analog, analog split channel; digit~al TDMA;
digital CDMA; analog/analog split channel; analog/digital - 21- C~ R

TDMA; analog/digital CDMA; analog/analog split ehanneL/digital TDMA; analv~/ l7g split cl~u.cL~L~;Lal CDMA; analog/digital TDMA/digital CDMA; analog split channel/digital TDMA; analog split channeVdigit~l CDMA;
5 analog split channeL~vigit~al TDMA/digital CDMA; and digital TDMA/digital CDMA. It is t~7 be noted, of course, that such UI1C CUI~bL.U~.IiV1~ n_ may similarly be embodied by a portable l- l; ,t~ k~--r, and that ephnnA cv~lDLlucLul D may be designed t~7 generatA
ID other mn~ t~ inf~rm-tinn signals, and dual-, tri-, and multi-mode " ,~ s of other ~ nhir ^~Snn~ may be .vusL~ u~Lal. Therefore, while the above list is certainly not _~L_ua~ , any of the above cullDLlu~.Lullg may form - 426 and/or 432 according to the present 15 invention A-1~3it;~n_lly, illL~.~,ùu,ulill of l~,livL~ ulles 426 and 432 permits c~ Al --- between the l~ ~_L~, ones of the r~A~ )t~ h ~ ~ ~, and, hence, 1~ .A 426 may utilize the circuitry of 1_1;~,~ 1, h F 432 and vice versa Plerel Ll,~, aD C ..-...--.;. _t.;.... between the two I " L 1~ hc ~a 426 and 432 includes transfer of data including qi~n_llin~ transfer such as: il"t~ ; cllinE between the l~ 1 h F~ to indicate times when the 1~ ~l; ,t~ 1 F~ are il-L~.~ u~
th_.~tvE;eLL_., transfer of prûgram; f ~ including 26 data set as well as repertory dial ;--f-- ",~t:~ , and other -lline trangfer to permit one of the ~ t~7 utilize circuitry of the other ~ h~, ~ For e~ample, llir~ tran8fer between portable ~ .h....~ 426 and mobile ' "r' ~ 432 may permit the portable } ~ to utilize circuitry of the mobile r~ 7t^l ~
432 including mobile 1_ ' ', ~ ~ circuitry pertailling to t,-~ power, receiver e .lD;LiviLy, antenna ~I_Ct~.;DL~D~ as well as speaker phone filnrt;-nc diversity, speech synthesis, and voice reCOgnition capability -22- , ('~ qOR

Turning now to the partial block, partial circuit Qrhpm~t~ of FIG. 5, the i.lI,_.i.~-l.L.g between a p~ pair guch as r~linte~ pair 420 of FIG. 3 according to a preferred ~ ~- " of the present invention 5 is ~hown in greater detail. Connector 490, shown in hatch in FIG. 5 cu. .. ~.,,u. d~ to connector 444 of FIG. 3. Connector 490 is a iU~ LU~P1 plug-type c ~ Lul which, in the preferred ~ .~.ho.l;.~ ;n. e eight pin rnnnPr~jrn~ 494, 498, 502, 506, 510, 514, 518, and 524. The right-hand side portion of the0 figure illustrates selected portions of the circuitry of a first ph~ referred to by reference number 526, of the "hr...r pair, and the lePc-hand side portion of the figure illllQL~AtP~ selected portions of the circuitry of a second - referred to generally by reference number 530,5 of the 1 . ' - ' ~ ( ? pair.
In the following tl~ r"~ first r " ~ '~ ~ 526 i5 aportable.. -1;~ I.'r.. r andthesecond1 ~ 1,' -630 is a mobile ra~ t-' ~L - having circuitry p~ .e efficient tr~n~mil of i.lf .- -~: -.l upon a cellular, system of increased capacity. It is to be noted, of course, that other ~n nhin~hrn~ of portable and moWle l_": ' ~' ~ pairs are possible, and that the circuitry p~....i~i.,~ most efficient l..-~ : o ~ of ;. r, ~ upon a cellular, ~ AI -)-- system of ill~LC---~ capacity may, of 26 cour~e, be embodied within ._ '-L' 1' ~tlll e 526 rather than ~, ' - 530. A~l~litinn~lly, according to the following ~ 5 ;1'~ of the preferred I - I o l;. ~ the data sequence forming the code i8 ~nnt~inpd within . " ', ' - - 526. The data sequence may, of course, be contained within ' ', ' - 530 rather than I " ', ' - 526, or, alternately, different data ~ r. forming the code may be contained within both l_~ ', ' 526 and 530.
Pin ~ 494 indicates a speaker , ,~P~I O -between the, l:..~ l, I-l.... ,r pair 526-530. Pin r~m~ 498 - 23 - ~.onr~R

indicates a microphone . -...~ - - between the ~ ~I L - pair 526-530. Pin ~ P ~ - 502 indicates a ground c ~-...o~ between the ~ ~, L pair 526-530.
Pin ~ .P~ 506, 510 and 514 indicate a 3-wire data bus 5 ~A"~ --betweenl "~ ' p} ~ 526-530. Pin ~nnPct;~n 518 indicates a common-power cQnnPr~ti~n between the l 1d~ ? pair 526-530, here ind~icated to be at a 9.5 volt potential difference above ~round. Pin ~ ~lr- 1 --- 524 also indicates a ground rrnnP~ir~n between ' ~ ' - pair 10 526-530.
P.in c -.~.P~ 494, 498, and 502 form audio ~ ..."~F ~ A between ' ~ ' A I - 526 and 530 which permit, for e~cample, when r_ ' ' ' ,L - 526 ~ F.~F3 a portable ~ .kl..~F., the portable l~ p~L - to act as a 15 handset of IL '-L' ' ,L ~ 530 As illustrated, ~ erLrnP
526 includes spea.,er 534 and ~-~ù~ul~ e 540 which are r~nnFrtPd to pin ~ F~ ---C 494 and 498, ~ ~c~ ly, through mute gates 544 and 548, .. ~. ly. Mute gates 544 and 548 are r~nn- I by lines 552 and 556, . ~ , to ~,~c~.. l . lP. 560.
When ~ L - 526 is suitably . '-d wit, ' - ' ,' - 530, spea~er 534 and r~. ~upllur~ 540 are rnnnPctsd to t.~,.8~;~_. portion 566 of ~ rl ~ 530-n~8~ . portion 566 g,.._.6Lo5 a mrcl~ ts~i, information 25 signal w,Lich is emitted by antenna 570 to be received by a base station such as one of the base stations 112 of FIG. 1.
Ru-' ' p~ - 526 of FIG. 5 further includes an on-off switch 574 which may be actuated by a user ~l t~ to power, or to pûwer, to ' - ~ 526 by ~a ~j"t~ k-~ 530.
3D When ~ .k.... ~F 526 is not il.~e. w~ ' - I with ra-lirtalP~hrnP 530, sw~itch 574 is operat~ive to pûwer or to ~ the supply of power to, c~ t~ k~ ~p 526 through an internal power supply 578 of the r~ir~t~ 526.
Switch 574 may, for e~cample, be L~ in~d of a ... ..- -.t~

-~5-2C1~9'~56 switch operative to mnmPntPrily ground pin rnnnPction 498 Regulator 580 contained within, ~ - 530 is enabled by switch 574 to power ~ 530, and, by way of pin fnnnP~;r~n 518, al80 ~ 526. Other switches, 5 although not shown, may also be included in circuitry to activate regulator 580. One such switch configuratio~ is described in US Patent No. 4,798,975 issued on January 17, 1989, entitled "High Noise I~1LUI~ Input Level Detector with H~ ", assigned to assignee of the present 10 invention.
Regulator 582 rontPinPd within ' - ' ~, ' - 526 supplies the rP~ I,h- -.r with power during i ~ ~u~ g with ,. ~ l"L"--.~ 530. Pin fnnnP~;-~nQ 506, 510, and 514 permit transfer of data between the illdi~;dU.9l ones of 15 l_~ ~, L - pair 526-530. In apreferred P-. h~ ,t, the data bus formed thereby may utili~e data transfer scheme such as those described in US Patent Nos. 4,369, 516, and 4,654,655.
Briefly, pin ~nnnP~ n 506 i~l~.CUll~ Q the "T"
lines of the three-wire bus, pin ~ ~-.f~P~ 510 iut_.. ùmlf,.
tbe "C" lines of the ilue~ ;le bus and pin - ..P- ~: --. 514 iu~,~ ùm.f_Ls the "R" line of the llu~ bus. The "T" and "C" lines are utilized to transmit data from l- i~.v~ Pr 584of ,LnnP530tol".~.Y ~ 560of 25 " l~p} ? 526. The "R" line is used to transmit data from u~- ..l-- l-- 560 of rPflift ' ,' - 526 to mi~.uw..,l.ule.
584 of, . 1 t- l- ~h- P Of 530 RP~ ' r~~ ~ 526 further includes ~c.u~ .l. ~l 588 which, a~ illustrated, is also coupled to the "T", "C" and "R" of the data bus.
l l, 588 of rP~io~ h..~r 526 ;~l~f - I~.~P~ with keypad 592 and display element 596 of the 1 l:. ,r~ nnP
When suitably illL~ .U~ d, therefore, infn~TnPt;r~n entered by a user upon keypad 592 may be ~ ,f~ d to ~ I Pr - 25 - ~F00~R.
.~

584 of, ~ h~ ~F 530 and to ~ .v~ I P- 560 of r 526.
The r~L;.J. Il...._ executed by LLLLC-V~ 560 of '' ' 'e, ~ e 526 are stored in memory 600, such as a read-5 only memory. Similarly, the .16... 1.1~. ' e~ecuted by L~O- '""l" 1- 584 0f ._ "~' ', ~ e 530 are stored in ~,.. ~.. F'~ 604 and 608 which, as in~ te~3 may be c u.. ~ d of read-only memory and random access memory, ly. Mic,. -r ' 560 is ^~l~lit;r~nolly coupled to 10 memory elements 612 and 616 which, ~_f~ .~ly cu~,u. zd EEPROM L~ u~;Cl~ and~o~v l /t. 584is-~ ly coupled to memory elements 620 and 624, also formed of EEPROM ,.. ... :t-n In the preferred .h~.l;,....1 of the present invention, the data 9 ~ ~ ~ forming the codes 15 (which, when l '' ~ to a base station form the Iink therewith) are stored in memory elements 612, 616, 620 andlor 624. As noted previously, such data include~ NAM information, and, also, repertory dialing information. The NAM inf~r~nAti~n~ may for e~-mple, be ntoinFd in memory elements 612 and 620, and the - ~ - d repertory dialing inf~rm~t;on may be stored in memory element 616 and 624. M;.,l l~'' . .l .. . t. o 560, 584, and 588 are preferably ~ - l-- :- -~1 of Motorola ~IL~,. U,U~ U. ~, Model Nos. MC68HC11.
~i As noted hereinabove,, l;-,t 1- L.h.. F 526 according to the preferred -~hv 1;~ -t of the present invention cu...,u.;PF3 aportable, ~ . L - 526,and,A~l; t lPl.k....F530 a mobile L 1('~
DLrfu. ..~ between the mobile and the portable are, at 30 times, ~ - A--l One Lrr_~ ~c~, is that the mobile includes a specially ~1P~ RAM 608. The RAM 608 is used, in response to a request from the LU~ U~ 584 over the data transfer bus formed by pin ....n~ 506, 510 and 514 for storing the portable's NAM infr)rmAti~n which is - 26 - l~l;.On~R

~059956 dow~nloaded from EEPROM 612 of the portable. Such a data transfer allows the mobile to assume the portable's identity for subsequent rn~ nir~t~rn on the system.
The mobile also ~ 9 du ' ' ~ of the 6 portable's repertory dialing c~ from EEPROM 616.
This i8 ~;rc ~ hf~d by providing that the mobile's EEPROM
624 is not only used for storing the mobile's repertory dialing infrrTno~i~m, but also used, in response to a request from the ~.. ,vc~ 584 over the data transfer bus (506, 510, and ID 514), for storing the portable's repertory dialing information which is downloaded from EEPROM 616 of the portable.
Preferably, the EEPROM 624 is portioned into individual memory blocks, each of which is dedicated to the particular radio's repertory r "- according to the radio's ~rjotod unique phone number.
An alternative method for the mobile to access the portable's repertory dialing; ~ -r - . . . - l :~,., in EEPROM 616 is for the portable to transfer only the dialing ;"r, - ",_l 'G ~ that is selected at the portable. This would minimize the amount of 2D data to be Ll r ~d in ~itllnt;~n~ where the user only requires the mobile for limited usage. For e~cample, consider a situation where the user desires to have ths mobile assume the portable's identity for a single phone call. Once the i~l~.~uLI,ulillg is . hli~hP~l the user selects a particular 2~ r pertory dialing key on the portable (or ,C I I ~ , " g key on the mobile). In response, the portable transfers the n~ce~ y dialing ;..r--....-l: - . to the mobile for 1,. '~ via the mobile's l~ .. When the call is complete, the user removes the portable for ;,..~. " .,-1- ~t usage.
3û According to the present invention, by allowing the mobile to employ the portables' NAM and repertory dialing --rullllatlul~ the user may employ the mobile as though it were the portable, thus, nn-~intoinin~ the same L~ ollc number and repertory dialing ;.lr ... ~ while p,~ .v.,lil-g - - radio usage of the same phone number.
Another ~lilro~ e between the portable and the mobile is that the ~._ a~ . 630, conventional to any portable, may 5 be disabled in response to the ~.u~ t- - 560 detecting the availability and selection of the more powerful mobile t. ~.. 666. The detection is ~ bythe u~ l-u~ 560 ...~ - ;..g the 9.5V cc~"nocti"n 518 through a line ~ circuit 634. The line ~
10 634 maybe ' i using sbipolar ~ . Ib function is to convert the 9.5V signal to a binary signsl to indicate whether or not the 9.5V signal is present. The selection of the mobile l-~ e;~i. 566 ~ ly occurs after the portable is il~t~..~ ' i with the moWe and - is - ' ' ' - ' between the twû radios. The selection to employ the mûbile lr - ~ _. may alsû be manually ' d by providing for an user code, e.g.. key sequence, which is ~ ..-- -- Fd into the portable's keypad 592 to instruct the mobile to enable its ~ 3Co;~ dil-~ly.
:i~) A third vil~.e.,ce involves the portable power supply.
- As ~L~i.ivuol~ ' d, the switch 574 on the portable actuates a voltage regulator 580 in the mobile to provide power to the portable during the i..to.~vu~ lg mode.
C~ with this i~lt~.~.vu~ g, the power which is5 internal tv the portable, battery 578 is disabled. This is i through the U80 of a ~ l. . 638 on the w~_tv.. When the intercoupling is made, the ~,.v~, 638 opens a switch 642 which disables internal power from being provided to the portable. While the portable is not 30 '~ i with the mobile, the switch 642 is normally closed. A diodO 646 is ~nnP~tPd between the battery 578 and thô ~-..l 1: -. 634 to prevent the battery 578 from falsely e the presence of the 9.5V from the mobile.
Oe~ R

2059~56 As p~o~iOuoly tli~c~ e~l, one Llv~~ of the radio hll~.~vu~ g is that the portable is able to employ a number of mobile features which would not otherwise be available. The manner in which the portable employs the mobile's 5 L1O.n3~G ~G. circuitry has been discussed above. A d~ li of the manner in which the mobile's voice-speaker phone and voice ~ "6~;1 ~" and speech synthesis circuitry follows.
The mûbile's vûice ,~ . and speech synthesis circuitry voice-speaker phone is depicted by blûck 650 of FIG.
10 5. After the radiû i~ ,uu~ lg is ~ hP-l the user enables the mobile's VISP 650 by either entering a special key code into the portable's keypad 692 or by speaking a special command into the ....,.u,uhon~ 654.
Once the mûbile's VlSP 650 is enabled, the user employs 15 the speaker 658 ant the Lui~.~u~hullc 654 as normal. The V/SP
650 decodes the speaker'~ verbal ~ A and provides the decoded ;--f,~ to the LUi-,lU~,Vlll~lUl~,. 584, which " ' initiates data transfers to the l,10~:1B~ 566 and to the portable's display 596.
The VlSP 650 may be , ' ~ a by wing a cv~ iv..al voice recn~ni~i~n/speech synthesis system.
, ' ,~ is "Method and A, r t~ for S~
Speech for Speech Rl~ rl~ Te~lato3n, described in Canadian patent .-- No. 526,266 f'lled December 24, 1986, 2~ assigned to the same assignee.
Although the VISP 650 is shown ~ e with the v~ . via an in~1PpPntlPn~ c~nnPct;rrll the data transferbw (506, 510, and 514) may ~IlG.l~ ,y be employed.
The mobile's ~. L~J~aLel phone operation is utilized by entering a special key code into the portable's keypad 592.
When the special key code is ~ ~.6..; -d by the ~,.u~
584, the lUi~.U~ 584 instructs the VlSP to enable the speaker 658 and the microphone 654 for the user's use. The ~p~ - 29- CEv0~90R
.

2~599~6 speaker 658 and the microphone 654 are disabled either by a second special key code, by ~ -...P ~ g the portable from the mobile or by lifting a separate handset 448 (c~nnpct~d to the mobile as shown in FIG. 3) of ~hook.
Turning now to the flow diagram of FIG. 6, the method steps of the method of the present invention are ~ otrPte~
First, and as indicated by block 700, at least two ~ - ~. .O
are ~l~ t.,~Lher wherein at least one of the L~3;~;~_.s contain a code which, when h "' I to a fi~ed site of a ~.. ;. _~.;~m network, permitO a l~ link to be created therewith. Ne~t, and as indicated by block 704, the code is ll~ to the first h~lo~ . when the code is c~nt~inPd in the second receiver and an ;-lf~- ...A~-~..- signal is to be l~A.~ d in the first 15 L mode. Nest, and as indicated by block 708, the code is i " . ~ to the second L~u~o~ . when the code is ~ inPd in the first ll~l3x:~. and an ;..r~ ... ~l:-..~ signal is to be; 1 in a second LlA- ~ ---- mode. Nest, and as indicated by block 712, the code is; '~ ~ to a fised site 20 of the c ..-~ - network to permit fnrm~ m thereby of a ~ link between one of the at least two L,On~ and the ~ - ... -.;- ~ :v ~ network.
In a preferred Pmho~l;m~nt of the present invention, and as indicated by block 716, upon ~ r ..~ the 26 ~ e 2~ ~~, the i " .~1 code is erased in the accepter radio to prevent two radios from having the ~ame code set on the system at the same time.
When, according to a preferred ~ ~2 " ' of the preOent invention il'-- c~L~d in FIG. 5" rl;~JI- l- I-l.---.A 526 is ' ~ ROd of a portable l~ l.h~ r of ~u, ~ù~bL u.Li~,n, and, " '~p~ o 530 is ~ of a ~obile having circuitry to permit efficient L~ -, . of i~u. u~LG~ upon a cellular, c- .----- --:-system of increased capacity, i..L~ ,u~uli"g of the - 30 - C~R

~ -31- 205~9.6 1~,)} - - 526 and 530 th~.l.GtU~;GIl~_. permits transfer of t_e NAM in~^,rm~t;~^^ contained in memory elements 612 of sphnnn 526 tO , 584 of ,~
530. Once; -" Gd to u~..v~v ~lJUt~ 584, such NAM
5 ~ " maybe supplied to h6~L~:~a. portion 566 whereat the NAM; -r -.~ - - is ,-~ according to a desired technique and supplied to anterma 570 to be t[A' - - ~ l IO`d therefrom. Because the NAM ~ ' need only be stored in ~ , L~ e 526, separate access fees 10 required to pronde unique NAM ~ --. to each of the "- 1 ~ 1 526 and 530 is not required. Utilization of the more efficient; 0f infr~ t;o^. according to a cellular, c---- .~ system is i~ of portable : ' p} - 526 when suitably h.Le.. , '-' with mobile 530. CVI1~G~ /, when ~ I, 526 is not ~ c '~ i with ~ ' - - 530, ~ 526 is also p 'l ~ to be operated to form a -- - ..:- r~ Iink with a cellular, ~ system to transmit ",f,,~ lL~ signals l~_.e~ -,h-While the present invention has been desc2ibed in ~ v- o ~ :o~ with the preferred P .ho-~ shown in the various figures, it is to be ~ - u! vod that other similar .~hv.l;". .,1~ may be u8ed and ",^-~ and additions may be made to the described . ..h~ for ~- f -:~e the ~i same function of the present invention without deviating i' ~u..,. Therefore, the present invention should not be limited to any single .h~-l.. I, but rather construed in breadth and scope in ~ I- .ce with the recitation of the -rPpn~l~d claims.
- 31- C`.li...~ R

Claims

THE EMBODIMENTS OF THE INVENTION IN WHICH AN
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED
AS FOLLOWS:

1. A mixed-mode transceiver system operable on a communication network having at least one fixed site including receiver circuitry for receiving information signals modulated at least in a first transmission mode to form modulated signals of first modulation characteristics, and alternatively, modulated in a second transmission mode to form modulated signals of second modulation characteristics other than the first modulation characteristics, said transceiver system comprising:
at least two transceivers, wherein the first transceiver of the at least two transceivers is operable to transmit to the at least one fixed site the information signals modulated to have the first modulation characteristics, and a second transceiver of the at least two transceivers is operable to transmit to the at least one fixed site the information signals modulated to have the second modulation characteristics, and wherein at least one of said first transceiver and said second transceiver of the at least two transceivers contains a code which, when modulated and transmitted to a fixed site of the at least one fixed site of the communication network, causes a communication link to be created therewith; and an intercoupling plug connector for intercoupling said first transceiver and said second transceiver to transfer said code from said first transceiver to said second transceiver when the code is contained in the first transceiver whereby said code signal is modulated according to the second modulation characteristics, or for transferring said code from said second transceiver to said first transceiver when the code is contained in the second transceiver whereby said code signal is modulated according to the first modulation characteristics.

- 32a -

2. The mixed-mode transceiver system of claim 1 wherein the code contained by at least one of the first transceiver and the second transceiver iscontained by both the first transceiver and the second transceiver.

3. The mixed-mode transceiver system of claim 1 wherein said code contained by at least one of the first transceiver and the second transceiver comprises a data set for uniquely identifying the transceiver.

4. The mixed-mode transceiver system of claim 1 wherein said means for intercoupling physically interconnects the first transceiver and the second transceiver theretogether.

5. The mixed-mode transceiver system of claim 1 wherein said first transmission mode comprises a frequency-modulated, analog transmission mode of conventional bandwidth.

6. The mixed-mode transceiver system of claim 1 wherein said second transmission mode comprises a discretely-encoded transmission mode.

7. The mixed-mode transceiver system of claim 1 wherein said second transmission mode comprises a frequency modulated analog transmission mode of reduced bandwidth.

8. The mixed-mode transceiver system of claim 1 wherein said first transceiver of the at least two transceivers comprises a portable radiotelephone.

9. The mixed-mode transceiver system of claim 1 wherein said second transceiver of the at least two transceivers comprises a mobile radiotelephone.

10. The mixed-mode transceiver system of claim 1 further comprising means disposed within at least one of the first transceivers and the second transceivers for determining times when the means for intercoupling couples the first transceivers and the second transceiver theretogether.