(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT)
`
`(19) World Intellectual Property Organization
`International Bureau
`
`(43) International Publication Date
`17 January 2002 (17.01.2002)
`
` (10) International Publication Number
`
`WO 02/05443 A2
`
`(51) International Patent Classification7:
`
`H04B 1/00
`
`(21) InternationalApplication Number:
`
`PCT/USOl/41059
`
`(22) International Filing Date:
`
`20 June 2001 (20.06.2001)
`
`27511 (US). HAYES, Gerard, J. [US/US]; 207 Lilliput
`Lane, Wake Forest, NC 27587 (US).
`
`(74)
`
`Agents: BENNETT, David, E. et al.; Coats & Bennett,
`PLLC, Post Office Box 5, Raleigh, NC 27602 (US).
`
`(25) Filing Language:
`
`(26) Publication: Language:
`
`(30) Priority Data:
`09/612,034
`
`English
`
`English
`
`(81)
`
`7 July 2000 (07.07.2000)
`
`US
`
`(71) Applicant (for all designated States excep/ US): ERICS-
`SON INC. [US/US]; 7001 Developmemt Drive, Research
`Triangle Park, NC 27709 (US).
`
`(84)
`
`(72) Inventors; and
`IRVIN, David, R.
`(75) Inventors/Applicants (for US only):
`[US/US]; 1546 Iredell Drive, Raleigh, NC 27608 (US).
`RYDBECK, Nils [SE/US]; 207 Rutherglen, Cary, NC
`
`Designated States (national): AE, AG, AL, AM. AT, AU,
`AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU,
`CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM,
`HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK,
`LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX,
`MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL,
`TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
`
`Designated States (regional): ARIPO patent (GH, GM,
`KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW), Eurasian
`patent (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), European
`patent (AT, BE, CII, CY, DE, DK, ES, FI, FR, GB, GR, IE,
`IT, LU, MC, NL, PT, SE, TR), OAPI patent (BF, BJ, CF,
`CG, CI, CM, GA, GN, GW, lVIL, MR, NE, SN, TD, TG).
`
`[Continued on next page]
`
`(54) Title: PORTABLE COMMUNICATION DEVICE WITH RF OUTPUT POWER CAPPED WHEN THE DEVICE OPERA
`ATES IN VERY CLOSE PROXIMITY TO A HUMAN BODY
`
`(57) Abstract: A mobile terminal
`used in a wireless communication
`system is operable to limit transmitter
`power if proximate a human body.
`The mobile
`terminal
`includes
`a
`
`housing. A transmitter in the housing
`is connected to an antenna.
`The
`
`transmitter has a power control loop
`controlling transmitter power.
`A
`detector detects
`if the housing is
`proximate a human body. A control
`is
`operatively
`connected
`to
`the
`transmitter power control
`loop and
`to the detector,
`the control
`limiting
`transmitter power
`if
`the detector
`detects that the housing is proximate
`ahuman body.
`
`TRANSMITTER
`
`«flh
`
`WO02/05443A2
`
`ZTE, Exhibit 1006-0001
`
`ZTE, Exhibit 1006-0001
`
`

`

`WO 02/05443 A2
`
`||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
`
`Published:
`7 without international search report and to be republished
`upon receipt of that report
`
`For two-letter codes and other abbreviations, refer to the "Guid-
`ance Notes on Codes andAbbreviations " appearing at the begin-
`ning ofeach regular issue ofthe PCT Gazette.
`
`ZTE, Exhibit 1006-0002
`
`ZTE, Exhibit 1006-0002
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`PORTABLE CONEMUNICATION DEVICE WITH RF OUTPUT POWER
`
`CAPPED WHEN THE DEVICE OPERATES
`
`IN VERY CLOSE PROXIMITY TO A HUMAN BODY
`
`FIELD OF THE INVENTION
`
`This invention relates to a mobile terminal used in a Wireless communication
`
`system and, more particularly, to a mobile terminal operable to limit transmitter power if
`
`proximate a human body.
`
`BACKGROUND OF THE INVENTION
`
`A mobile terminal used in wireless communication systems, such as cellular
`
`telephone systems, is generally a portable device. In fact, mobile terminals are becoming
`
`small enough to fit into a user'spocket, and therefore be very close to the user's body. The
`
`mobile terminal includes a transmitter for transmitting a radio frequency (RF) signal
`
`through the air.
`
`In a cellular communication system the mobile terminal conducts radio
`
`communications with a base station located proximate the mobile terminal. Cellular
`
`communication systems include control systems for limiting power. Typically, the base
`
`station instructs the mobile terminal to use the least power to avoid interference with other
`
`mobile terminals. The base station does so by measuring signal strength and returning
`
`instructions to the mobile terminal to modify transmitter power output.
`
`While conducting a voice call, the mobile terminal is placed in a "talk" position
`
`next to the user's head. Although there is no basis for concerns regarding an antenna being
`
`proximate the user, for psychological comfort the user can hold the mobile terminal
`
`spaced away or at an angle so that the antenna is farther from the user's head. Mobile
`
`1
`
`ZTE, Exhibit 1006-0003
`
`ZTE, Exhibit 1006-0003
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`terminals are also used to provide wireless connection for personal computers and the like
`to gain access to the Internet. With smaller mobile terminals the user might slip the
`
`mobile terminal intola shirt pocket or the like while the call is being conducted.
`Again, to provide psychological comfort regarding RF transmitters being very
`
`V close to a human body, there is a need to control RF power output under such situations.
`
`SUMMARY OF THE INVENTION
`
`In accordance with the invention, there is pr‘ovideda mobile terminal that caps or
`limits RF power output when the mobile terminal is very close to the user, and yet permit
`the mobile terminal to operate without a power cap otherwise.
`
`Broadly, there is disclosed herein a portable communication device operable to.
`
`limit transmitter power ifproximate a human body. The device includes a housing. A
`transmitter in the housing is connected to an antenna. _A detector detects ifthe housing is
`
`proximate a human body. A control is operatively connected to the transmitter and to the
`
`detector. The control controls transmitter power and limits transmitter power if the
`
`detector detects that the housing is proximate a human body.
`
`It is a feature of the invention that the transmitter is connected to the antenna
`
`through a circulator and the detector senses reflected power from the circulator.
`
`It is another feature of the invention that the transmitter is connected to the antenna
`
`through a directional coupler and the detector measures voltage standing wave ratio using
`
`the directional coupler.
`
`It is a further feature of the invention that the control comprises a programmed
`
`processor and the detector is implemented by the programmed processor.
`
`It is yet another feature of the invention that the detector comprises a photo
`
`detector proximate an opening in the ‘housing. The photo detector is proximate a speaker
`2
`
`ZTE, Exhibit 1006-0004
`
`ZTE, Exhibit 1006-0004
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`opening in the housing so that if the device is in a "talk" position next to a user's head,
`
`then amount of light at the photo detector decreases.
`
`It is still another feature of the invention that the detector comprises a touch-
`
`,
`
`sensitive detection circuit. The detection circuit comprises a conductive element
`
`proximate speaker openings in the housing so that if a device is in a "talk" position next to
`
`a user's head, then the conductive element is in contact with the user's head.
`
`It is still a further feature of the invention that the portable communication device
`
`comprises an AMPS mobile terminal and the controllerpresets a mobile attenuation code if
`
`the detector detects that the housing is proximate a human body
`
`It is still an additional feature of the invention that the control integrates transmitter
`power if the detector detects that the housing is proximate a human body and limits
`transmitter power after the integrated transmitter power exceeds a select threshold.
`
`There is disclosed in accordance with another aspect of the invention a mobile
`
`terminal used in a wireless communication system and operable to limit transmitter power
`
`if proximate a human body. The mobile terminal includes a heusing. A transmitter in the
`
`housing is connected to an antenna. The transmitter has a power control loop controlling
`
`transmitter power. A detector detects if the housing is, proximate a human body. A
`
`. control is operatively connected to the transmitter power control loop and to the detector,
`
`the control limiting transmitter power if the detector detects that the housing is proximate
`
`a human body.
`
`Further features and advantages of the invention will be readily
`
`apparent from the specification and from the drawings.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`Fig. l is a block diagram of a mobile terminal in accordance With the invention;
`
`ZTE, Exhibit 1006-0005
`
`ZTE, Exhibit 1006-0005
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`Fig. 2 is a general block diagram of the mobile terminal of Fig. I specifically
`
`illustrating the power limiting feature of the invention;
`
`Fig. 3 is a flow diagram illustrating a program implemented in the processor of
`
`Fig. 1 for limiting transmitter power output;
`
`Fig. 4 is a flow diagram illustrating a programimplemented in the processor of
`
`Fig. 1, in accordance with an alternative embodiment ofthe invention, for limiting
`transmitter power output;
`2
`
`Fig. 5 is a block diagram, similar toFig. 2, illustrating a detector according to a
`
`first embodiment of the invention;
`
`'Fig. 6 is a block diagram, similar to Fig. 2, illustrating a detector according to a
`
`second embodiment of the invention;
`
`‘ Fig. 7 is a front elevation View of a mobile terminal including a detector according
`
`to a third embodiment of the invention;
`
`Fig. 8 is a sectional View taken along the line 8-8 of Fig. 7;
`
`.
`
`Fig. 9 is a front elevation view of a mobile terminal including a detector according
`
`to a fourth embodiment of the invention; and
`
`Fig. 10 is a sectional view taken along the line 10-10 of Fig. 9.
`
`DETAILED DESCRIPTION OF THE INVENTION
`
`Fig. 1 is a block diagram of a typical mobile terminal shown generally at 10. The
`
`mobile terminal includes a housing 11, an antenna 12, a receiver 16, a transmitter 18, a
`
`speaker 20, a processor 22, a memory 24, a user interface 26 and a microphone 32. The
`
`antenna 12 is mounted to and can be extended from the housing 11. Alternatively, the
`
`antenna 12 could be internal to the housing 11. The antenna 12 is configured to send and
`
`receive radio signals between the mobile terminal 10 and a wireless network (not shown),
`
`4
`
`ZTE, Exhibit 1006-0006
`
`ZTE, Exhibit 1006-0006
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`such. as a cellular communications system. The antenna 12 is connected to a duplex filter
`
`14 which enables the receiver 16 and the transmitter 18 to receive and broadcast,
`
`respectively, on the same antenna 12. The receiver 16 demodulates, demultiplexes and
`
`decodes the radio signals into one or more channels. Such channels includes a control
`
`‘ channel and a traffic channel for speech or data. The speech or data are delivered to the
`
`speaker 20 (or other output device, such as a modem or fax connector).
`
`' The receiver 16 delivers mesSages from the control channel to the processor 22.
`
`The processor 22 controls and coordinates the functioning of the mobile terminal 10
`responsive to messages on the control channel using programs and data stored in the
`
`memory 24, so that the mobile terminal 10 can operate within the wireless network. The
`
`, processor 22 also controls the operation of the mobile terminal 10 responsive to input from
`the user interface 26. The user interface 26 includes a keypad 28 as a user—input device
`
`and a display 30 to give the user information. Other devices are frequently included in the
`
`user interface 26, such as lights and special purpose buttons. The processor 22 controls
`
`the operations of the transmitter 18 and the receiver 16 over control lines 34 and 36,
`
`respectively, responsive to control messages and user input.
`
`The microphone 32 (or other data input device) receives speech signal input and
`
`converts the input into analog electrical signals. The analog electrical signals are
`
`delivered to the transmitter 18. The transmitter 18 converts the analog electrical signals
`
`into digital data, encodes the data with error-detection and correction information and
`
`multiplexes this data with control messages from the processor 22. Alternatively, the
`
`mobile terminal 10 may be connected to a laptop computer or the like which transfers
`
`digital signals to the transmitter 18. The transmitter 18 modulates this combined data
`
`stream and broadcasts the resultant radio signals to the wireless network through the
`
`duplex filter 14 and the antenna 12.
`
`ZTE, Exhibit 1006-0007
`
`ZTE, Exhibit 1006-0007
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`In accordance with the invention, the mobile terminallO includes a proximity
`
`detector 38 for detecting if the housing 11, and thus antenna 12, is proximate a human
`body. The detector 38 is operatively connected to the processor 22. The processor 22 '
`
`operates in accordance with a control program, as described more specifically below, to
`
`limit or. cap transmitter power outputrif the antenna 12 is proximate a human body.
`
`Particularly, the power is capped, rather than reduced, so that a power control loop
`
`operates properly when the expected transmitter power falls below the cap even though
`the antenna 12 is proximate the user.
`1
`
`Referring to Fig. 2, a block diagram illustrates the power limiting aspect of the -
`invention. Particularly, the transmitter 18 is expanded to generally illustrate a power
`
`control loop 40 for controlling transmitter power output. A baseband block 42 generates
`
`an RF signal to be transmitted. The RF signal is provided to an RF driver stage 44. The
`RF driver stage 44 supplies sufficient signal level to a power amplifier 46. The power
`
`amplifier 46 amplifies the signal and provides it to the antenna 12.
`
`The driver stage 44 and power amplifier 46 are operatively connected to the
`processor 22. The processor 22 conventionally controls operation ofthe driver stage 44
`
`and power amplifier 46 to control transmitter power output.
`In an advanced mobile phone system (AMPS), tor example, the base station with
`
`which the mobile terminal 10 is communicating transmits a mobile attenuation code
`
`(MAC) identifying one of eight power levels. The processor 22 controls the power control
`
`loop 40 so that power output satisfies the MAC.
`
`' In accordance with the invention, the processor 22 implements a logic function so
`
`that ifthe proximity detector 38 senses that the antenna 12 is proximate the user, then the
`
`processor 22 establishes a power level cap that the power amplifier 46 is not permitted to
`
`exceed. For example, in an AMPS mobile terminal, mobile attenuation codes 000, 001,
`
`6
`
`ZTE, Exhibit 1006-0008
`
`ZTE, Exhibit 1006-0008
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`'010 and 011 could be reset to 100 if the antenna 12 is near the user. This establishes a
`
`100-milliwatt power cap on the power amplifier 46. The other mobile attenuation codes,
`i.e., 100, 101, 110 and 111, would be processed unaltered, regardless of proximity to the
`
`user, as the power output amounts generated from these Codes are less than the cap.
`
`As is apparent, the power limiting feature ofthe invention is not limited to AMPS
`
`mobile terminals. This feature can be used with other types of mobile terminals by
`
`limiting transmitter power output using codes or commands particular to the particular
`
`type mobile terminal.
`
`‘
`
`{In a first aspect of the invention, the processor 22 intervenes instantaneously in the
`
`power control loop 40. Thus, as soon as proximity is detected by the detector 38, then
`
`transmit power is capped. This is illustrated in the flow diagram of Fig. 3.
`
`The flow diagram begins at .a block 50 that checks proximity using the proximity
`detector 38, A decision block 52 determines if the-antenna 12 is proximate a user. If not,
`
`then a decision block 54 determines if power was previously capped. If not, then control
`
`loops back to the block 50. If so, then the power cap is undone at a block 56 and control
`then loops back to the block 50.
`I
`
`If the antenna 12 is proximate the user, as determined at the decision block 52, then
`
`' a decision block 5 8 determines if power is greater than a select threshold. The threshold
`
`can be a factory—set value or user-set value that defines the power cap. In the example
`
`discussed above, the threshold is 100 milliwatts, represented by MAC 100. If poweris not
`
`greater than the threshold, then it is not necessary to limit or cap power output and control
`
`loops back to the block 50. If power is greater than the threshold, then power is capped at
`
`a block 60. The power is capped by reducing the power command signals to the driver
`
`stage 44 and/or the power amplifier 46, see Fig. 2. Control then loops back to the block
`
`50.
`
`ZTE, Exhibit 1006-0009
`
`ZTE, Exhibit 1006-0009
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`In accordance with a second aspect of the invention power is integrated as by
`
`accumulating sample values over time before the processor 22 intervenes. In this aspect of
`
`the invention, energy, represented by power over a specified integration interval, is the
`
`driving factor rather than power. This aspect is illustrated by the flow diagram of Fig. 4.
`
`,The flow diagram begins at a block 70 which awaits transmitter activity along with
`
`a decision block 72. .If there is no activity, then control continually loops between the
`
`block 70 and the decision block 72. If there is transmitter activity, then a block 74 starts a
`clock. The clock is used to set a specified integration interval. A block 76 performs the
`
`integration by accumulating the product of power and time. A decision block 78
`
`determines if the accumulated amount is greater than a select threshold. If so, then power
`
`is capped at a block 80 and the routine ends. If the accumulated amount is not greater than
`
`the select threshold, then a decision block 82 determines if the transmitter is active. if not,
`then the clock and accumulator are reset at a block 84 and control loops back to the block
`
`70. If the transmitter is active, then a decision block 86 determines if the loop has reached
`
`the end of a time—based interval. If not, then control loops back to block 76 to continue
`
`the integration function. If so, then the accumulator is reset at a block 88 and control
`
`loops back to the block 76 to begin another integration interval.
`
`The block diagram of Fig. 2 is a functional diagram illustrating power limitation in
`
`accordance with the invention. Specific embodiments for detecting proximity are
`
`illustrated below relative to Figs. 5-10. Flements corresponding to those in Fig. 2 are
`
`. identified with like reference numerals and are not described in detail.
`
`Referring initially to Fig. 5, it is known that close proximity to the user's body
`
`detunes the mobile terminal's antenna 12. In this embodiment a circulator 90 is connected
`
`between the power amplifier 46 and the antenna 12. Reflected power from the circulator
`
`90 is measured by the processor 22. The processor 22 compares reflected power with a
`
`8
`
`ZTE, Exhibit 1006-0010
`
`ZTE, Exhibit 1006-0010
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`select threshold. When reflected power exceeds the select threshold, then the processor 22
`
`detects that the antenna 12 is proximate a human body.
`
`Referring to Fig. 6, a functional block diagram illustrates a second embodiment for
`
`proximity detection. In the embodiment of Fig. 6, the power amplifier 46 is connected to
`
`_ the antenna 12 through directional couplers 92. The directional couplers are operatively
`
`connected to the processor 22. The processor 22 measures the voltage standing wave ratio
`
`(VSWR) using the directional couplers 92. When the VSWR exceeds a select threshold,
`
`then the processor 22 detects that the antenna 12 is proximate a human body. The VSWR
`
`is computed in accordance with the following:
`
`
`VSWR = VF +VR =
`VF —VR
`
`
`
`1+ $31;:
`1— ’—
`“6;:
`F
`
`where VF is forward voltage, Va is reflected voltage, P1: is forward power and PR is
`
`reflected power.
`
`In either embodiment of Fig. 5 or Fig. 6, the processor 22 controls the power
`
`_ control loop 40 by establishing apower level cap that the power amplifier 46 is not
`permitted to exceed, as discussed above relative to Figs. 3 and 4.
`
`Referring to Fig. 7, the mobile terminal housing 11 includes openings 94 for the
`speaker 20, see Fig. 1, and an opening 96 for a photodetector 98. As shown in Fig. 8, the
`
`speaker 20 and photo detector 98 are mounted to a printed circuit board 100 in the‘housing
`
`l 1 .
`
`The photo detector 98 uses a photo-conductive element, such as cadmium selanide,
`
`whose electrical resistance decreases as incident illumination increases. The change in
`
`resistance can be detected by the processor 22, see Fig. 1, to function as a proximity
`
`detector.
`
`ZTE, Exhibit 1006-0011
`
`ZTE, Exhibit 1006-0011
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`The photo detector opening 96 allows‘ light to pass through the housing 11 to the
`
`photo detector 98', as shown generally in Fig. 8. When the mobile terminal 10 is placed in
`
`the "talkf' position next to the user's head, then the amount of light to the photo detector 98
`
`decreases. The detection of this decrease in light, representing proximity of the housing
`
`11 to a,human body, can be used by the processor 22 to cap or limit output power, as
`
`discussed above.‘ With the exception oftotal darkness, there is always a decrease in light
`
`when the phone is placed next to the user's head. As is apparent, if the housing 11 is
`
`proximate the user’s head, then the antenna'l2 is also proximate the user's head.
`Alternatively, the embodiment ofFig. 7 may be operable to detect the presence of
`
`a user by incorporating a photo-conductive element that is sensitive to infrared, i.e., the
`
`thermal output of a user.
`
`Referring to Figs. 9 and 10, the mobile terminal 10 uses proximity detection in
`
`accordance with a fourth embodiment of the invention, The housing includes a conductive
`element 102 surrounding the speaker openings 94. In the illustrated embodiment ofthe
`
`invention, the conductive element 102 is a metallic ring. The‘ring 102 is connected to a
`
`touch—sensitive detection circuit 104 mounted on the printed circuit board 100. When the
`
`mobile terminal 10 is placed in the "talk" position next to the user's head, then the metallic
`
`ring 102 comes in contact with the user's ear. The touch-sensitive detection circuit 104'
`
`senses. this change in contact and sends a signal to the processor 22 for capping or limiting
`
`pOWer output, as discussed above.
`
`Thus, in accordance with the invention a proximity detector and logic functions are
`
`used for capping or limiting transmitted power output responsive to an indication of close
`
`proximity to a human body
`
`10
`
`ZTE, Exhibit 1006-0012
`
`ZTE, Exhibit 1006-0012
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`WE CLAIM:
`
`CLAIMS
`
`1. A portable communication device operable to limit transmitter power if
`
`proximate a human‘body, comprising:
`
`_
`
`an antenna;
`
`. a transmitter connected to the antenna;
`
`a detector for detecting if the antenna is proximate a human body; and
`
`a control operatively connected to the transmitter and to the detector, the
`
`control controlling transmitter power and limiting transmitter power if the detector detects
`
`that the antenna is proximate a human body.
`
`2. The portable communication device of claim 1 wherein the transmitter is
`
`connected to the antenna through a circulator and the detector senses reflected power from
`
`the circulator.
`
`3. The portable communication device of claim 1 wherein the transmitter is
`
`connected to the antenna through a directional coupler and the detector measures voltage
`
`standing wave ratio using the directional coupler.
`
`4. The portable communication device of claim 1 wherein the control comprises a
`
`programmed processor and the detector is implemented by the programmed processor.
`
`5. The portable communication device of claim 1 further comprising a housing
`
`and wherein the detector comprises a photo detector proximate an opening in the housing.
`
`11
`
`ZTE, Exhibit 1006-0013
`
`ZTE, Exhibit 1006-0013
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`6. The portable communication device of claim 5 wherein the photo detector is
`
`proximate a speaker opening in the housing so that if the device is in a talk position next to
`
`a users head, then amount of light at the photo detector decreases.
`
`,7. The portable communication device of claim 1 further comprising a housing
`
`and wherein the detector comprises a touch—sensitive detection circuit.
`
`8. The portable communication device of claim 7 wherein the detection circuit
`
`comprises a conductive element proximate speaker openings so that if the device is in a
`
`talk position next to a users head, then the conductive element is in contact with the users
`
`head.
`
`9. The portable communication device of claim 1 wherein the portable
`
`communication device comprises a cellular mobile terminal and the control resets a
`
`mobile attenuation code if the detector detects that the antenna is proximate a human body.
`
`10. The portable communication device of claim 1 wherein the control integrates
`
`transmitter power if the detector detects that the antenna is proximate a human body and
`
`limits transmitter power after the integrated transmitter power exceeds a select threshold.
`
`11. A mobile terminal used in a wireless communication system and operable to
`
`limit transmitter power if proximate a human body, comprising:
`
`an antenna;
`
`a housing;
`
`12
`
`ZTE, Exhibit 1006-0014
`
`ZTE, Exhibit 1006-0014
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`a transmitter in the housing connected to the antenna, the transmitter having a
`
`power control loop controlling transmitter power;
`
`a detector for detecting if the antenna is proximate a human body; and
`a control operatively connected to the transmitter power control loop and to
`the detector, the control limiting transmitter power if the detector detects that the antenna
`
`is proximate a human body.
`
`712. The mobile terminal of claim 11 wherein the transmitter is connected to the
`
`antenna through a circulator and the detector senses reflected power from the circulator.
`
`13. The mobile terminal of claim 1‘1 wherein the transmitter is connected to the
`
`antenna through a directional coupler and the detector measures voltage standing wave
`
`ratio using the directional coupler.
`
`14. The mobile terminal of claim 11 wherein the control comprises a programmed
`
`processor and the detector is implemented by the programmed processor;
`
`15. The mobile terminal of claim 11 wherein the detector comprises a photo
`
`detector proximate an opening in the housing.
`
`16. The mobile terminal of claim 15 wherein the photo detector is proximate a
`
`speaker opening in the housing so that if the device is in a talk position next to a user's
`head, then amount of light at the photo detector decreases
`
`17. The mobile terminal of claim 11 wherein the detector comprises a
`
`touch-sensitive detection circuit.
`
`13
`
`ZTE, Exhibit 1006-0015
`
`ZTE, Exhibit 1006-0015
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`18. The mobile terminal of claim 17 wherein the detection circuit comprises a
`
`conductive element proximate speaker openings in the housing so that if the device is in a
`
`talk position next to a users head, then the conductive element is in contact with the users
`
`head.
`
`.
`
`19. The mobile terminal of claim 11 wherein the mobile terminal comprises a
`
`cellular mobile terminal and the control resets a mobile attenuation code if the detector
`
`detects that the antenna is proximate a human body;
`
`20. The mobile terminal of claim 11 wherein the control integrates transmitter power
`
`if the detector detects that the antenna is proximate a human body and limits transmitter
`
`power after the integrated transmitter power exceeds avselect threshold.
`
`14
`
`ZTE, Exhibit 1006-0016
`
`ZTE, Exhibit 1006-0016
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`12
`
`
`
`26
`
`A
`
`22‘
`
`PROCESSOR -
`
`3°
`
`
`
`
`
`
`
`
`
`24
`
`‘
`
`
`
`‘
`
`28
`
`j
`
`‘
`
`MEMORY
`
`34
`
`‘fl’
`I
`TRANSMITTER
`
`
`
`.
`
`32 .
`.
`
`18
`
`1 1
`
`'
`
`10
`
`FIG. 1
`
`1/5
`
`ZTE, Exhibit 1006-0017
`
`ZTE, Exhibit 1006-0017
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`BASEBAND
`
`
`
`
`10
`
`FIG. 2
`
`
`
`BASEBAND
`
`
`
`
`PROCESSOR
`
`FIG. 5
`
`ZTE, Exhibit 1006-0018
`
`ZTE, Exhibit 1006-0018
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`.
`
`CHECK
`PROXIMITY
`
`'
`
`PROXIMATE
`USER?
`
`POWER CAP
`
`,
`
`'
`
`'
`POWER
`CAPPED
`
`54
`
`-'
`
`‘
`
`_ POWER>
`THRESHOLD
`
`.—
`
`.
`
`YES».
`
`..
`
`56""
`
`'
`
`.
`
`UN-DO
`
`FIG. 3
`
`3/5
`
`ZTE, Exhibit 1006-0019
`
`ZTE, Exhibit 1006-0019
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`
`
`AWAIT TRANSMITTER
`ACTIVITY
`
`7O
`
`
`
`
`
`
`
`END OF
`
`INTERNAL YES
`
`RESET
`ACCUMULATE
`
`88
`
`‘
`
`FIG. 4
`
`4/5
`
`ZTE, Exhibit 1006-0020
`
`ZTE, Exhibit 1006-0020
`
`

`

`WO 02/05443
`
`PCT/US01/41059
`
`BASEBAND
`SENSED
`
`
`.
`
`ICOUPLERS
`(WRECHONAU
`
`
`
`
`
`PROCESSOR
`
`FIG. 6
`
`10
`
`1
`
`1o
`
`
`
`96
`94
`
`98
`
`100
`
`20
`
`10
`
`11
`
`FIG. 8
`
`5/5
`
`ZTE, Exhibit 1006-0021
`
`ZTE, Exhibit 1006-0021
`
`