CA1310697C - Bus for cellular telephone - Google Patents
Bus for cellular telephoneInfo
- Publication number
- CA1310697C CA1310697C CA000563497A CA563497A CA1310697C CA 1310697 C CA1310697 C CA 1310697C CA 000563497 A CA000563497 A CA 000563497A CA 563497 A CA563497 A CA 563497A CA 1310697 C CA1310697 C CA 1310697C
- Authority
- CA
- Canada
- Prior art keywords
- transceiver
- information
- control signal
- peripheral device
- predetermined period
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
ABSTRACT OF THE DISCLOSURE
An apparatus for interconnecting a cellular telephone transceiver and one or more peripheral devices, such as handsets or speakerphones, is disclosed. The apparatus provides a bus-type interconnection in which multiple peripheral devices may connect with a single transceiver, and the flow of information from the peripheral devices to the transceiver is regulated in accordance with a protocol.
An apparatus for interconnecting a cellular telephone transceiver and one or more peripheral devices, such as handsets or speakerphones, is disclosed. The apparatus provides a bus-type interconnection in which multiple peripheral devices may connect with a single transceiver, and the flow of information from the peripheral devices to the transceiver is regulated in accordance with a protocol.
Description
4~ ~o 1`~: lo ~; ~17 523 1 1:3~ CE~HRI g II~Et~ 5 1310~97 BA~RGROUNP O~ THE INVENTION
1. Field of the In~enti~n . _ . ., Thi6 invention generall~ rela~e8 to the fleld of cellular.
(radio) telephones and, more spec~flcally, to an inter-connection device for connectlng two cellular telephone components.
1. Field of the In~enti~n . _ . ., Thi6 invention generall~ rela~e8 to the fleld of cellular.
(radio) telephones and, more spec~flcally, to an inter-connection device for connectlng two cellular telephone components.
2, _~iscussion of the Prior Art A ~ohlle cellular telephone 6yst~ conslst6 o~ several components inol~ding an antenna, a transeelver ~nd a perlpheral device, ~uch a~ a handset. The handset i~ conne~ted to the transceiver and may be operated by a u~er in ~uch the same way as a conventlonal telephone handset. several typeæ of information are exch~n~ed between the tran~ceiv~ and hands~t including audio signals, data, and commands. There ~e fundamental dif~erence~, however, between the information types. For example, the audio si~nals are typi~lly ~nalog while the data and commands are in digi~l form. In addition, the digital ineormation may be transmitted ~t different speeds depend~ng on ~he ~ype of inform~lon or the ~o~rce. Th~s, the interconnection between the transeeiver and the handset, or between other components of the ~y~t~m wh~ ~h m~t Q~hAn~
slmllar types o~ in~ormation, ~ust accommodate ~11 o~ the in~ormation types and their reSpective characte~istlcs.
U ~ .' 111; 1 4 ~ 3 b ~ ~ 5 ~ 7 ~ E ~; R R i & 11 C 1` E ~ 0 7 131~7 R6g-005 One typ~ of interconnection known 1n the pr~or art is ~
~o-called "s~ar" connectlon. The ~tar conne~t~on lncludes a multi-wire cable ~hi~h extends from the trans~eiver to a ~unction box. The ~unction box typically prov~de~ a connectlon point for a single peripheral device.
The ma~or dis~dv~tage of the st~r-typ~ connection ~ that it not "open ended". In othe~ words, a transceiver which h~s a slngle st~r-type connection can only be connecte~ to one peripheral devlce at o time, whlch ~everely limit~ a user's ability to conf~g~ee ~ system to meet the requirements of a speciflc application.
SUMMARY OF THE ~NVENTION
.~
~ he present invention provides a ~u~-type interconnectio~
for a cellular telephone 6ys~e~. The interconnection ~a~ be used to connect a number of components includlng transce~ver6, b~s controllers and peripheral de~lces.
~ he ~nterconnection so~pri es a plurality of paths which provide for the pa ~age of au~io signals, lnformatlon, and a control signal between two ~o~ponent~. The control signal regulates the flow o~ inform~tion from both the b~s controllers and the peripheral dev~ces to the tr~nsceiver.
Each component which is connected to the lnterconn~ction ifi interchangeable with any like component in the system. A8 a 131~7 result, a user may quickly and easily interchange or substitute components and thereby reconfigure the system to meet the needs of a particular application.
According to one aspect, the invention provides a cellular telephone transceiver, said transceiver comprising:
A. audio signal interconnection means for passing audio signals between the transceiver and one or more peripheral devices;
B. information signal interconnection means for passing information signals between the transceiver and one or more peripheral devices; and C. control signal interconnection means for receiving a control signal from or transmitting a control signal to one or more peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
According to another aspect, the invention provides a peripheral device for use with a cellular telephone transceiver, said device comprising: A. audio signal interconnection means for passing audio signals between the peripheral device and a cellular telephone transceiver; B. information signal interconnection means for passing information signals between the peripheral device and the transceiver; and C. control signal interconnection means for passing a control signal between the peripheral device and the 131~97 transceiver, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that the peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from the peripheral device.
In another aspect, there is provided a cellular telephone system, said system comprising: A. a cellular telephone transceiver; B. one or more peripheral devices; and C. system interconnection means for connecting the transceiver to each of the peripheral devices, the system in~erconnection means including: i. audio signal interconnection means for passing an audio signal between the transceiver and the peripheral devices, ii. information signal interconne~tion means for passing an information signal between the transceiver and the peripheral devices, iii. control signal interconnection means for passing a control signal between the transceiver and the peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
4a 1 3 ~ 7 6~21-411 BRIEF DESCRIPTION OF THE DRAWINGS
This invention is pointed out with particularity in the appended claims. The above and further advantages of this invention may be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which:
Figure 1 is a block diagram of a cellular telephone system which includes an interconnection apparatus constructed in accordance with the preferred embodiment of the present invention;
Figure 2 is a more detailed diagram of a peripheral device connected t,o the interconnection apparatus shown in Figure 1 ;
Figure 3 is a more detailed diagram of the interconnection apparatus shown in Figure 2; and Figure 4 is a timing diagram showing a series of steps by which a peripheral device may pass information to a transceiver.
4b ' S ~ 2 ~ 5 2 3 1 1 æ 7 C E S ~ R I & M C K E N ~I 0 2 ~ igure 1 is a block dia~ram oi' ~ cellul~r telephone 6y~tem 2, A cellul~r telephone transceiver 4 i6 conn~cted to an antenna 3, The transceiver 4 includes h single input 5. A
peripheral device 6a ~y be connected dlrectly to th~ input 5 by a bus interconnec~ion lOa shown in dash~d llnes.
Alternatively, a fir~t node controller ~a may be connected to the input 5 by an interconnection lQ~. A perlpheral device ~'o iS then connected to the node controllef 8~ 'oy an interconnecticn lOc. Simil~rly, o ~econ~ node controller ab 1~
oonnected to the first node controller ~a b~ an lnterconnection lOd. R peripheral device 6c is connected to the ~e~ond nod~
controller ~b by on intesconneetion lOe.
Each of the peripheral device~ ~a, 6b dnd 60 may eompr~se, for example, a stand~rd cellular telephone hand~et, a ~o-c~lled ~hands-free" or speakerphone ~nit, a "compact control ~nit" or other device by which a ~ser may eonver~e wlth another pacty.
Eaeh o the ~nterconnections lOa-lOe comprises a plur~lity of paths by which audio signals, information ~nd c~ntrol signal6 are passed. In gener~ ll of the interconnection~ lOa-lOe are identical, A~ a result, l1ke components withln the sys~em 2 may be rearranged to meet the requirements of a particular appllcation. For example, any one of the peripheral devioes ~ ~ S ~ J ` ~ 2 ~ 5 ' 3 1 1 ~ ~ C E S ~ I & 11 C ~: E ~11 0 3 ~ 3 ~ 7 P~6g-~OS
6a-6c may be interchanged with or ~ubstituted for either oP the other two periph~ral devi~es. One or mo~e additlonal node controllers (not 6hown) may also be 6ucoe6s~vely connected to the nnde controller 8b, thereby providing addltlonal connectl4n points for other peripheral devices. In oddition, the transceiver 4 m~y lnclude addltlonal input~ (not ~hown) whlch are si~ilar to the lnpu~ 5, ~hereby providlng addltion~l connection point ~or a single peripher~l device or one or more node controller6.
Figure 2 Ls a more det~iled diagra~ of the peripheral device 6b and the lnterconnection lOc 5hown in Flg~re l. The intereonnectiOn lOc comprises a path 12 by wh~ch power i~
supplied to the peripheral devlce 6b ~om the transcelver 4 (Fig~re 1). An information path 14 prnYides for bldirectional passage of informatlon, which may contain both d~t~ ~nd commands. An audio signal path 16 provides for bidirec~lonal passage o~ audio signals including ~oice, dual tone multifrequency (DTM~) ~ones ~nd lnformation tones. A control signal path 18 pro~ides for b1directional passage of a control signal which regulates the passage of information through the information path 14. ~inally, a path 20 provides a return to ground potentiol ~or the peripheral devlce ~b.
~ lgure 3 depicts a speciic implementation of the interConneotion lOc: showra ln Figures 1 and 2. A line 22 4 ~ æ ~ l ~ 5 ~ 3 ~ 113 7 ~: E ~ E ~ 4 131~7 R69--~05 provides a BOurce of ~uppl~ ~oltage to ~he perlphera1 device 6b. A 1~ne 24 ca~ie~ infor~atlon transmitted from the peripheral devlce hb whi~e A line 26 c~r~ies informatlon transmitted to the pe~ipher~l dev~ce. A l~ne 2B carcie~ a control signal for regul~in~ the pa6sage of infoematlon ~hrough the line 24. A line 30 c~rrle~ audio ~ignals transmitted from the peripheral devlce 6b while a line 32 carries audlo slgnals tr~nsmitted ~o the peripheral deviee. A
line 34 provides ~ source of supply voltage to the node controller ~ ure 1) and a llne 36 provides a ret~rn to ground potential.
The detailed operation of the interconnectlon lOc ma~ be ~nderstood with re~erence to both Figures 1 and 3. First, both of the lines 30 an~ 32 operate to pa~ aud$o slgnals in ~ly ~ne direc~ion~ Thus, it is possible for the perlpheral device bb to hoth transmit and receive ~udi~ si~nals 51multaneou61y, Second, information whlch is tran~mltted ~y the transceiver 4 to the peripheral devlce bb ls freely passed to the peripher~l device at all times vla the llne 26. In other words, the tran~cel~er 4 ha~ accesS to the line 2~ at all ~lmes and therefore transmits information to all of the peripheral devices simultane~sly. In ~ntr~st, be~ore ~ peripheral devlce c~n t~an~mit lnformatlon to ~he transceiver 4, that 4 ~ 2 G I ~ 5 ~
1 ~10697 ~ 69~005 perlpheral device must first ~eque~t ~cce~s to the line 2~ and thae request mu~t be qranted by the t~an6ceiver 4. The se~uence o~ 6teps by wh$ch A periphera~ device requests to ~end lnformat~on ls di~cussed in more det~il below in connectlon with Figure 4. In thi~ monner, the tr~nsceiver 4 may arbltr~te eBs to the line 24 when multiple peripheral devlces are ready to transmit informatlon.
The informatiOn carried by the lines 2q and 26 ls preferably in digital form and is preferably transmi~ted in an a~ynchronous ~erial format.
Figure 4 is a timing di3gram whleh deplct~ a ~eri~s of steps by which a peripheral device may transmit inform~ion to a transceiver. Referrin~ now to both FigureS 1, 3 and 4, a digital control slgnal 38 i~ c~rried hy the line 28 and an information signal 40 is carried by the llne 24. When the peripheral device 6b is ready to transmit ~nformation to the transceiver 4, the peripher~l device forces the c~ntcol signal 38 to a predetermined lo~ical st~te for ~ predetermined period ~f t~me T~qu~ t~ Following the expiration of the predetermined period, the peripheral device 6b "releases" the control 8ignal 3B and thereby permits it to fl~ctuate for a p~edetermined period of time Ttl ~ut' At the expiratiOn of the timeout period, the peripheral device 6b senses the logical state of -B-the control signal 38 for a predetermined period of time TteSt.
If the control signal 38 is still in the predetermined logical state 42, then the peripheral device 6b is free to transmit its information 46 to the transceiver. Once the transmission of the information is complete, the peripheral device 6b releases the control signal 38, which may then return to its original logical state.
The control signal and information signal shown in Figure 4 may be generated by conventional digital circuitry. The design of such circuitry is well within the capability of someone having ordinary skill in the art of digital circuit design.
The foregoing description has been limited to a specific embodiment of this invention. It will be apparent, how-ever, that variations and modifications may be made to the invention, with the attainment of some or all of the advantages of the invention. Therefore, it is the object of the appended claims to cover all such variations and modifications as come within the true spirit and scope of the invention.
_ g _
slmllar types o~ in~ormation, ~ust accommodate ~11 o~ the in~ormation types and their reSpective characte~istlcs.
U ~ .' 111; 1 4 ~ 3 b ~ ~ 5 ~ 7 ~ E ~; R R i & 11 C 1` E ~ 0 7 131~7 R6g-005 One typ~ of interconnection known 1n the pr~or art is ~
~o-called "s~ar" connectlon. The ~tar conne~t~on lncludes a multi-wire cable ~hi~h extends from the trans~eiver to a ~unction box. The ~unction box typically prov~de~ a connectlon point for a single peripheral device.
The ma~or dis~dv~tage of the st~r-typ~ connection ~ that it not "open ended". In othe~ words, a transceiver which h~s a slngle st~r-type connection can only be connecte~ to one peripheral devlce at o time, whlch ~everely limit~ a user's ability to conf~g~ee ~ system to meet the requirements of a speciflc application.
SUMMARY OF THE ~NVENTION
.~
~ he present invention provides a ~u~-type interconnectio~
for a cellular telephone 6ys~e~. The interconnection ~a~ be used to connect a number of components includlng transce~ver6, b~s controllers and peripheral de~lces.
~ he ~nterconnection so~pri es a plurality of paths which provide for the pa ~age of au~io signals, lnformatlon, and a control signal between two ~o~ponent~. The control signal regulates the flow o~ inform~tion from both the b~s controllers and the peripheral dev~ces to the tr~nsceiver.
Each component which is connected to the lnterconn~ction ifi interchangeable with any like component in the system. A8 a 131~7 result, a user may quickly and easily interchange or substitute components and thereby reconfigure the system to meet the needs of a particular application.
According to one aspect, the invention provides a cellular telephone transceiver, said transceiver comprising:
A. audio signal interconnection means for passing audio signals between the transceiver and one or more peripheral devices;
B. information signal interconnection means for passing information signals between the transceiver and one or more peripheral devices; and C. control signal interconnection means for receiving a control signal from or transmitting a control signal to one or more peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
According to another aspect, the invention provides a peripheral device for use with a cellular telephone transceiver, said device comprising: A. audio signal interconnection means for passing audio signals between the peripheral device and a cellular telephone transceiver; B. information signal interconnection means for passing information signals between the peripheral device and the transceiver; and C. control signal interconnection means for passing a control signal between the peripheral device and the 131~97 transceiver, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that the peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from the peripheral device.
In another aspect, there is provided a cellular telephone system, said system comprising: A. a cellular telephone transceiver; B. one or more peripheral devices; and C. system interconnection means for connecting the transceiver to each of the peripheral devices, the system in~erconnection means including: i. audio signal interconnection means for passing an audio signal between the transceiver and the peripheral devices, ii. information signal interconne~tion means for passing an information signal between the transceiver and the peripheral devices, iii. control signal interconnection means for passing a control signal between the transceiver and the peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
4a 1 3 ~ 7 6~21-411 BRIEF DESCRIPTION OF THE DRAWINGS
This invention is pointed out with particularity in the appended claims. The above and further advantages of this invention may be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which:
Figure 1 is a block diagram of a cellular telephone system which includes an interconnection apparatus constructed in accordance with the preferred embodiment of the present invention;
Figure 2 is a more detailed diagram of a peripheral device connected t,o the interconnection apparatus shown in Figure 1 ;
Figure 3 is a more detailed diagram of the interconnection apparatus shown in Figure 2; and Figure 4 is a timing diagram showing a series of steps by which a peripheral device may pass information to a transceiver.
4b ' S ~ 2 ~ 5 2 3 1 1 æ 7 C E S ~ R I & M C K E N ~I 0 2 ~ igure 1 is a block dia~ram oi' ~ cellul~r telephone 6y~tem 2, A cellul~r telephone transceiver 4 i6 conn~cted to an antenna 3, The transceiver 4 includes h single input 5. A
peripheral device 6a ~y be connected dlrectly to th~ input 5 by a bus interconnec~ion lOa shown in dash~d llnes.
Alternatively, a fir~t node controller ~a may be connected to the input 5 by an interconnection lQ~. A perlpheral device ~'o iS then connected to the node controllef 8~ 'oy an interconnecticn lOc. Simil~rly, o ~econ~ node controller ab 1~
oonnected to the first node controller ~a b~ an lnterconnection lOd. R peripheral device 6c is connected to the ~e~ond nod~
controller ~b by on intesconneetion lOe.
Each of the peripheral device~ ~a, 6b dnd 60 may eompr~se, for example, a stand~rd cellular telephone hand~et, a ~o-c~lled ~hands-free" or speakerphone ~nit, a "compact control ~nit" or other device by which a ~ser may eonver~e wlth another pacty.
Eaeh o the ~nterconnections lOa-lOe comprises a plur~lity of paths by which audio signals, information ~nd c~ntrol signal6 are passed. In gener~ ll of the interconnection~ lOa-lOe are identical, A~ a result, l1ke components withln the sys~em 2 may be rearranged to meet the requirements of a particular appllcation. For example, any one of the peripheral devioes ~ ~ S ~ J ` ~ 2 ~ 5 ' 3 1 1 ~ ~ C E S ~ I & 11 C ~: E ~11 0 3 ~ 3 ~ 7 P~6g-~OS
6a-6c may be interchanged with or ~ubstituted for either oP the other two periph~ral devi~es. One or mo~e additlonal node controllers (not 6hown) may also be 6ucoe6s~vely connected to the nnde controller 8b, thereby providing addltlonal connectl4n points for other peripheral devices. In oddition, the transceiver 4 m~y lnclude addltlonal input~ (not ~hown) whlch are si~ilar to the lnpu~ 5, ~hereby providlng addltion~l connection point ~or a single peripher~l device or one or more node controller6.
Figure 2 Ls a more det~iled diagra~ of the peripheral device 6b and the lnterconnection lOc 5hown in Flg~re l. The intereonnectiOn lOc comprises a path 12 by wh~ch power i~
supplied to the peripheral devlce 6b ~om the transcelver 4 (Fig~re 1). An information path 14 prnYides for bldirectional passage of informatlon, which may contain both d~t~ ~nd commands. An audio signal path 16 provides for bidirec~lonal passage o~ audio signals including ~oice, dual tone multifrequency (DTM~) ~ones ~nd lnformation tones. A control signal path 18 pro~ides for b1directional passage of a control signal which regulates the passage of information through the information path 14. ~inally, a path 20 provides a return to ground potentiol ~or the peripheral devlce ~b.
~ lgure 3 depicts a speciic implementation of the interConneotion lOc: showra ln Figures 1 and 2. A line 22 4 ~ æ ~ l ~ 5 ~ 3 ~ 113 7 ~: E ~ E ~ 4 131~7 R69--~05 provides a BOurce of ~uppl~ ~oltage to ~he perlphera1 device 6b. A 1~ne 24 ca~ie~ infor~atlon transmitted from the peripheral devlce hb whi~e A line 26 c~r~ies informatlon transmitted to the pe~ipher~l dev~ce. A l~ne 2B carcie~ a control signal for regul~in~ the pa6sage of infoematlon ~hrough the line 24. A line 30 c~rrle~ audio ~ignals transmitted from the peripheral devlce 6b while a line 32 carries audlo slgnals tr~nsmitted ~o the peripheral deviee. A
line 34 provides ~ source of supply voltage to the node controller ~ ure 1) and a llne 36 provides a ret~rn to ground potential.
The detailed operation of the interconnectlon lOc ma~ be ~nderstood with re~erence to both Figures 1 and 3. First, both of the lines 30 an~ 32 operate to pa~ aud$o slgnals in ~ly ~ne direc~ion~ Thus, it is possible for the perlpheral device bb to hoth transmit and receive ~udi~ si~nals 51multaneou61y, Second, information whlch is tran~mltted ~y the transceiver 4 to the peripheral devlce bb ls freely passed to the peripher~l device at all times vla the llne 26. In other words, the tran~cel~er 4 ha~ accesS to the line 2~ at all ~lmes and therefore transmits information to all of the peripheral devices simultane~sly. In ~ntr~st, be~ore ~ peripheral devlce c~n t~an~mit lnformatlon to ~he transceiver 4, that 4 ~ 2 G I ~ 5 ~
1 ~10697 ~ 69~005 perlpheral device must first ~eque~t ~cce~s to the line 2~ and thae request mu~t be qranted by the t~an6ceiver 4. The se~uence o~ 6teps by wh$ch A periphera~ device requests to ~end lnformat~on ls di~cussed in more det~il below in connectlon with Figure 4. In thi~ monner, the tr~nsceiver 4 may arbltr~te eBs to the line 24 when multiple peripheral devlces are ready to transmit informatlon.
The informatiOn carried by the lines 2q and 26 ls preferably in digital form and is preferably transmi~ted in an a~ynchronous ~erial format.
Figure 4 is a timing di3gram whleh deplct~ a ~eri~s of steps by which a peripheral device may transmit inform~ion to a transceiver. Referrin~ now to both FigureS 1, 3 and 4, a digital control slgnal 38 i~ c~rried hy the line 28 and an information signal 40 is carried by the llne 24. When the peripheral device 6b is ready to transmit ~nformation to the transceiver 4, the peripher~l device forces the c~ntcol signal 38 to a predetermined lo~ical st~te for ~ predetermined period ~f t~me T~qu~ t~ Following the expiration of the predetermined period, the peripheral device 6b "releases" the control 8ignal 3B and thereby permits it to fl~ctuate for a p~edetermined period of time Ttl ~ut' At the expiratiOn of the timeout period, the peripheral device 6b senses the logical state of -B-the control signal 38 for a predetermined period of time TteSt.
If the control signal 38 is still in the predetermined logical state 42, then the peripheral device 6b is free to transmit its information 46 to the transceiver. Once the transmission of the information is complete, the peripheral device 6b releases the control signal 38, which may then return to its original logical state.
The control signal and information signal shown in Figure 4 may be generated by conventional digital circuitry. The design of such circuitry is well within the capability of someone having ordinary skill in the art of digital circuit design.
The foregoing description has been limited to a specific embodiment of this invention. It will be apparent, how-ever, that variations and modifications may be made to the invention, with the attainment of some or all of the advantages of the invention. Therefore, it is the object of the appended claims to cover all such variations and modifications as come within the true spirit and scope of the invention.
_ g _
Claims (10)
1. A cellular telephone system, said system comprising: A.
a cellular telephone transceiver; B. one or more peripheral devices; and C. system interconnection means for connecting the transceiver to each of the peripheral devices, the system interconnection means including: i. audio signal interconnection means for passing an audio signal between the transceiver and the peripheral devices, ii. information signal interconnection means for passing an information signal between the transceiver and the peripheral devices, iii. control signal interconnection means for passing a control signal between the transceiver and the peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
a cellular telephone transceiver; B. one or more peripheral devices; and C. system interconnection means for connecting the transceiver to each of the peripheral devices, the system interconnection means including: i. audio signal interconnection means for passing an audio signal between the transceiver and the peripheral devices, ii. information signal interconnection means for passing an information signal between the transceiver and the peripheral devices, iii. control signal interconnection means for passing a control signal between the transceiver and the peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
2. The system as in claim 1 wherein the second portion of the control signal comprises either the first predetermined logical state or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.
3. The system as in claim 2 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from a peripheral device to the transceiver.
4. A cellular telephone transceiver, said transceiver comprising: A. audio signal interconnection means for passing audio signals between the transceiver and one or more peripheral devices; B. information signal interconnection means for passing information signals between the transceiver and one or more peripheral devices; and C. control signal interconnection means for receiving a control signal from or transmitting a control signal to one or more peripheral devices, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that a peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from a peripheral device.
5. The transceiver as in claim 4 wherein the second portion of the control signal comprises either the first predetermined logical state or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.
6. The transceiver as in claim 5 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from a peripheral device to the transceiver.
7. A peripheral device for use with a cellular telephone transceiver, said device comprising: A. audio signal interconnection means for passing audio signals between the peripheral device and a cellular telephone transceiver;
B. information signal interconnection means for passing information signals between the peripheral device and the transceiver; and C. control signal interconnection means for passing a control signal between the peripheral device and the transceiver, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that the peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from the peripheral device.
B. information signal interconnection means for passing information signals between the peripheral device and the transceiver; and C. control signal interconnection means for passing a control signal between the peripheral device and the transceiver, the control signal including at least first and second portions, the first portion comprising a first predetermined logical state which exists for a first predetermined period of time for indicating that the peripheral device is ready to transmit information to the transceiver through the information signal interconnection means, and the second portion for indicating whether the transceiver is ready to receive information from the peripheral device.
8. The peripheral device as in claim 7 wherein the second portion of the control signal comprises either the first predetermined logical stake or a second predetermined logical state which exists for a second predetermined period of time following the expiration of the first predetermined period of time.
9. The peripheral device as in claim 8 wherein the control signal includes a third portion which comprises the first predetermined logical state which exists for a third predetermined period of time, following the expiration of the second predetermined period of time, during which information may be transmitted from the peripheral device to the transceiver.
10. The peripheral device as in claim 8 wherein the second predetermined logical state indicates that the transceiver is not ready to receive information from the peripheral device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US3578887A | 1987-04-08 | 1987-04-08 | |
| US035,788 | 1987-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1310697C true CA1310697C (en) | 1992-11-24 |
Family
ID=21884789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000563497A Expired - Lifetime CA1310697C (en) | 1987-04-08 | 1988-04-07 | Bus for cellular telephone |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1310697C (en) |
-
1988
- 1988-04-07 CA CA000563497A patent/CA1310697C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |