Title of Invention	METHOD AND APPARATUS FOR SIMULTANEOUSLY COMMUNICATING ON A VOICE CHANNEL AND BROADCAST CHANNEL
Abstract	A method and apparatus is provided for simultaneously accessing a broadcast channel which allows for maintaining registration on the broadcast channel and a second channel. The broadcast channel includes a reverse link access channel for a portable communication device (120) to send registration messages to a base station and the method initially includes the step of determining whether a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected (302, 304, 306). After detecting the predetermined event, it is determined whether the portable communication device is communicating on the second channel (308). If not communicating on the second channel (308), registration on the broadcast channel is accomplished by transmitting a registration message on the reverse link access channel (320). If communicating on the second channel (308), the registration message is transmitted on the broadcast channel asynchronously (340) or, if supported by the base station (110), as a databurst of a packet of information on the second channel (330).

Title of Invention

METHOD AND APPARATUS FOR SIMULTANEOUSLY COMMUNICATING ON A VOICE CHANNEL AND BROADCAST CHANNEL

Abstract

A method and apparatus is provided for simultaneously accessing a broadcast channel which allows for maintaining registration on the broadcast channel and a second channel. The broadcast channel includes a reverse link access channel for a portable communication device (120) to send registration messages to a base station and the method initially includes the step of determining whether a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected (302, 304, 306). After detecting the predetermined event, it is determined whether the portable communication device is communicating on the second channel (308). If not communicating on the second channel (308), registration on the broadcast channel is accomplished by transmitting a registration message on the reverse link access channel (320). If communicating on the second channel (308), the registration message is transmitted on the broadcast channel asynchronously (340) or, if supported by the base station (110), as a databurst of a packet of information on the second channel (330).

Full Text	WO 2007/027309 PCT/US2006/027846 METHOD AND APPARATUS FOR SIMULTANEOUSLY COMMUNICATING ON A VOICE CHANNEL AND BROADCAST CHANNEL FIELD OF THE INVENTION The present invention generally relates to portable communication devices, and more particularly relates to a method and apparatus for a portable communication device to maintain registration with base stations when a voice channel and a broadcast channel are both in use. BACKGROUND OF THE INVENTION Today's portable communication devices have a multitude of functions in addition to the traditional point-to-point audio communications. Modern portable communication devices can receive and transmit multimedia signals, such as photos or videos, with or without accompanying audio. In addition, multimedia signals could be communicated in conventional point-to-point communication or could be broadcast simultaneously to a number of portable communication devices in a communication system. For example, a concert or a sporting event could be broadcast as multimedia signals on a broadcast channel to multiple portable communication devices which have subscribed to such services. The portable communication devices periodically register with base stations in the communication system to continue receiving the broadcasted multimedia signals by transmitting registration messages. Portable communication devices, when 1 WO 2007/027309 PCT/US2006/027846 receiving such signals on a broadcast channel on a first frequency, may wish to initiate point-to-point communication on a voice channel on a second frequency without terminating reception of the broadcasted signals on the broadcasting channel. However, the transmitter necessary for the point-to-point communication is being utilized to transmit the registration messages necessary to continue receiving the broadcast channel. Thus, what is needed is a method and apparatus for simultaneously accessing a voice channel and a broadcast channel which allows for maintaining registration on the broadcast channel. Furthermore, other desirable features and characteristics of the present invention will become apparent from the subsequent detailed description of the invention and the appended claims, taken in conjunction with the accompanying drawings and this background of the invention. 2 WO 2007/027309 PCT/US2006/027846 BRIEF DESCRIPTION OF THE DRAWINGS The present invention will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and FIG. 1 is a block diagram of a communication system in accordance with an embodiment of the present invention; FIG. 2 is a block diagram of a portable communication device of the communication system of FIG. 1 in accordance with the embodiment of the present invention; and FIG. 3 is a flowchart of the broadcast registration maintenance operation of the portable communication device of FIG. 2 in accordance with the embodiment of the present invention. 3 WO 2007/027309 PCT/US2006/027846 DETAILED DESCRIPTION OF THE INVENTION A method for simultaneously accessing broadcast communication on a first channel and other communication on a second channel is provided which allows for maintaining registration on the first channel. The first channel includes a reverse link access channel for a portable communication device to send registration messages to a base station and the method initially includes the step of determining whether a predetermined event requiring registration of the portable communication device on the first channel has been detected. The predetermined event may be reception of a message from the base station requiring the portable communication device to register on the first channel, or determination that a predetermined time has passed since a previous registration, or determination that the portable communication device is moving out of a coverage area of the base station. Next, the method in accordance with the present invention, after detecting the predetermined event, determines whether the portable communication device is communicating on a second channel. If not cornmunicating on a second channel, the portable communication device is registered on the first channel by transmitting a registration message on the reverse link access channel. If communicating on the second channel, the portable communication device is registered on the first channel by transmitting a registration message on the second channel, such as transmitting a databurst broadcast registration on the second channel. 4 WO 2007/027309 PCT/US2006/027846 When transmitting a databurst broadcast registration on the second channel, a broadcast registration message is first generated. Then the broadcast message is loaded into a databurst container and, thereafter, transmitted as a packet of information multiplexed with other information on the second channel. If the base station rejects databurst registration on the second channel or does not accept databurst communication, the portable communication device is asynchronously registered with the base station by, for example, freezing power control of the transmitter, slewing the transmitter to the first channel frequency, transmitting an asynchronous registration message on the first channel, slewing back to the second channel frequency, and restarting the transmitter power control. A portable communication device for simultaneously accessing a broadcast channel and another channel is also provided which allows for maintaining registration on the broadcast channel. The portable communication device includes an antenna, first and second receiver circuitry, transmitter circuitry, a transmitter channel selector, user interface devices and a controller. The antenna receives and transmits signals and is coupled to the first receiver circuitry which receives, demodulates and decodes signals on a broadcast channel to derive broadcast information therefrom, the second receiver circuitry which receives, demodulates and decodes signals on a second channel to derive second channel information therefrom, and the transmitter circuitry which encodes, modulates and transmits signals on either a reverse link access channel associated with the broadcast channel or on the second channel. The channel selector is coupled to the transmitter circuitry for selecting either the broadcast reverse link access channel 5 WO 2007/027309 PCT/US2006/027846 or the second channel for transmitting signals thereon and the user interface devices present the second channel information and the broadcast information to a user and also receive inputs from the user. The controller is coupled to the first receiver circuitry and the second receiver circuitry for receiving the broadcast and second channel information therefrom and also coupled to the user interface devices for providing the broadcast and second channel information thereto and for receiving the user inputs therefrom. When the controller determines that a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected, it provides a signal to the channel selector to transmit a registration message on the broadcast reverse link access channel if the portable communication device is not communicating on the second channel and provides a signal to the channel selector to transmit a registration message on the second channel if the portable communication device is communicating on the second channel. A predetermined event requiring registration of the portable communication device on the broadcast channel could be reception of a registration request message, reception of a signal from a timer coupled to the controller indicating that a predetermined time has passed since a previous registration, or reception of a signal from an out of coverage area detector coupled to the first and second receiver circuitry and the controller indicating that the portable communication device is moving out of a coverage area of the base station. 6 WO 2007/027309 PCT/US2006/027846 The controller includes a databurst container which generates a packet of information from the registration message and a channel signal power controller for controlling the signal power on the second channel. The controller can then provide the packet of information to the transmitter circuitry for transmission of a databurst broadcast registration as a packet of information multiplexed with the second channel information on the second channel when the portable communication device is communicating on thereon. In addition, when the base station has rejected the databurst broadcast registration on the second channel or if the second channel base station advertises that it will not accept databurst broadcast registrations, the controller transmits the registration message to the base station asynchronously by, for example, (a) freezing the channel signal power controller, (b) signaling the channel selector to switch the transmitter circuitry from the second channel to the reverse link access channel, (c) providing an asynchronous registration message to the transmitter circuitry for transmission on the reverse link access channel therefrom, (d) signaling the channel selector to switch the transmitter circuitry from the reverse link access channel back to the second channel, and (e) restarting the channel signal power controller. A communication system is also provided which includes a plurality of base stations having a coverage area associated therewith for communicating on broadcast channels and second channels therein with a portable communication device as described above. The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the 7 WO 2007/027309 PCT/US2006/027846 invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention. Referring to FIG. 1, a communication system 100 in accordance with an embodiment of the present invention includes a plurality of base stations 110 and a portable communication device 120. The plurality of base stations 100 communicate with the portable communication device 120 on channels for conventional point-to-point communications and on broadcast channels for broadcasting multimedia signals to multiple portable communication devices 120 which have subscribed to such services. Associated with each of the plurality of base stations 110 is a coverage area 125 wherein the portable communication device 120 can receive signals from and transmit signals to such one of the plurality of base stations on either a broadcast channel or another channel. While FIG. 1 depicts a single communication for supporting both broadcast communication on one channel and other communication on a second channel, the present invention is equally applicable to use in two overlapping communication systems where one system supports broadcast communication and a second communication system supports communication on a second channel. Referring to FIG. 2, a portable communication device 120 in accordance with the embodiment of the present invention is shown. The portable communication device 120 includes an antenna 202 for receiving and transmitting radio frequency (RF) signals. A receive/transmit switch 204 selectively couples the antenna 202 to first receiver circuitry 206 and transmitter circuitry 208 in a 8 WO 2007/027309 PCT/US2006/027846 manner familiar to those skilled in the art. The receive/transmit switch 204 may also consist of diplex circuitry to connect the antenna 202 to the receivers 206, 210 and transmitter 208 as is well known to those skilled in the art. In accordance with the present invention, second receiver circuitry 210 is also coupled to the receive/transmit switch 204. The second receiver 210 may also be connected to a second antenna instead of the receive/transmit switch 204 for reception of signals from a different communication system (e.g., a local or WiFi communication system). The first receiver circuitry 206 and the second receiver circuitry 210 demodulate and decode the RF signals to derive information and are coupled to a controller 212 for providing the decoded information thereto for utilization thereby in accordance with the function(s) of the portable communication device 120. The controller 212 also provides information to the transmitter circuitry 208 for encoding and modulating information into RF signals for transmission from the antenna 202. In accordance with the present invention, the portable communication device 120 includes diversity receivers whereby the first receiver circuitry 206 and the transmitter circuitry 208 could support a broadcast channel on a first frequency, while the second receiver circuitry 210 could be tuned to a second channel. The controller 212 is coupled to user interface circuitry 214 including, for example, a display 218 for presenting video output to a user, user controls 216, such as a keypad, for receiving user input thereon, a microphone 220 for receiving voice input which is converted to digital signals by an analog-to-digital (A/D) 9 WO 2007/027309 PCT/US2006/027846 converter 222, and a speaker 224 for providing audio output to the user after passing signals through a digital-to-analog (D/A) converter 226. The controller 212 is further coupled to a nonvolatile memory device 228 for storing information therein and for retrieving and utilizing information therefrom. Additionally, the controller 212 is coupled to a clock 230 for receiving a clock signal therefrom and to a registration timer 232 for providing a signal to the controller 212 after a predetermined time has passed after registering with the base station 110 (FIG. 1). An out of area detector 234 monitors the strength of the received signals at the first and/or second receiver circuitry 206, 210 to determine when the portable communication device 120 is moving out of a coverage area 125 of one of the plurality of base stations 110 (FIG. 1). Additionally, the controller 212 signals a channel selector 236 to switch the operational channel of the transmitter circuitry 208. In accordance with the present invention, the channel selector 236 can switch the transmitter circuitry 208 from transmitting signals on the reverse link access channel of the broadcast channel to transmitting on the second channel. In addition to other functionality, the controller 212 includes a databurst container 238 for generating packet information for providing to the transmitter circuitry 208 for transmission of a databurst message as a packet of information multiplexed with voice information. The controller 212 further includes a channel signal power controller 240 for controlling the power of the signal provided to the 10 WO 2007/027309 PCT/US2006/027846 transmitter circuitry 208 when the transmitter circuitry 208 is tuned to the second channel. When receiving broadcast signals, the portable communication device 120 must periodically register with one of the plurality of base stations 110 to continue to receive the broadcast signals. The operation of the broadcast registration maintenance routine 300 of the controller 212 is depicted in the flowchart of FIG. 3. Initially, the controller 212 determines whether a predetermined event requiring registration of the portable communication device 120 on the broadcast channel has been detected by determining whether a registration request message has been received from the base station 302 requiring the portable communication device 120 to register on the broadcast channel, or determining whether a signal from the timer 232 indicates that a predetermined time has passed since a previous registration 304, or determining whether a signal from the out of area detector 234 indicates that the portable communication device 120 is moving out of a coverage area 125 of the one of the plurality of base stations 110 with which the portable communication device 120 is registered 306. When one of the predetermined events has been detected 302, 304, 306, processing next determines whether the portable communication device 120 is communicating on a second channel 308, such as a voice channel. Not all of the plurality of base stations support databurst communication. A databurst reject flag can be set to indicate the one of the plurality of base stations 110 with which the portable communication device 120 is communicating doe's not support databurst communication. When processing determines that a signal from 11 WO 2007/027309 PCT/US2006/027846 the out of area detector 234 indicates that the portable communication device 120 is moving out of a coverage area 125 of the one of the plurality of base stations 110 with which the portable communication device 120 is registered 306, the databurst reject flag is unset 310 before the second channel communication deterrnining step 308. If none of the predetermined events has been detected 302, 304, 306, processing determines whether the portable communication device 120 wishes to establish communication on a second channel 312 while receiving the broadcast signals, such as when the user inputs a number to initiate a telephone call. If the portable communication device 120 wishes to make a call 312, a second channel (e.g., a voice channel) is established 314 with the transmitter circuitry 208 and the second receiver circuitry 210, while the broadcast channel is maintained on the first receiver circuitry 206. Processing then returns to determine if one of the predetermined events has been detected 302, 304, 306. If none of the predetermined events has been detected 302, 304, 306, and a call is not being established 312, processing determines whether the broadcast is completed 316 by, for example, determining whether the broadcast signals have ceased. When the broadcast terminates 316, registration on the broadcast channel does not need to be maintained and the broadcast channel registration maintenance routine ends 318. If the broadcast is not complete 316, processing returns to determine if one of the predetermined events has been detected 302, 304, 306. 12 WO 2007/027309 PCT/US2006/027846 After one of the predetermined events has been detected 302, 304, 306, if the controller 212 determines that the portable communication device 120 is not communicating on a second channel 308, the transmitter circuitry 208 is free so the portable communication device 120 can be registered on the broadcast channel by transmitting a registration message on the reverse link access channel 320. The timer 232 is then reset 322 to begin measuring the predetermined time to transmission of the next registration message. Processing then returns to await detection of one of the predetermined events 302, 304, 306, a request to establish a second channel 312 or completion of the broadcast signals on the broadcast channel 316. If, on the other hand, the controller 212 determines that the portable communication device 120 is communicating on a second channel 308, the databurst reject flag is checked to determine if it is set 324 indicating that the base station does not support databurst communication. If the databurst reject flag is not set 324, the broadcast registration message is generated 326 and loaded 328 into the databurst container 238. In accordance with the present invention, the databurst container 238 for broadcast registration generates a packet of information as a databurst broadcast registration message 328. The databurst broadcast registration message is then multiplexed with second channel information and provided to the transmitter circuitry 208 for transmission therefrom on the second channel 330. Specifically, the burst type 000111 parameter for Third generation CDMA2000 (currently unassigned) could be assigned to "Broadcast Support" (see Table 4.1-1 on page 4-1 of Standard C.R1001-D, 3GPP2) and the databurst 13 WO 2007/027309 PCT/US2006/027846 container 238 would packetize the broadcast registration message into a packet of information and the packet of information would be transmitted over the voice channel using dim_burst/Blanlc_burst as provided in existing standards 330. Next the controller 212 determines from information received whether the base station has rejected the databurst broadcast registration message 332. Alternatively, the controller 212 may have set the databurst reject flag if the controller 212 has determined that the base station does not accept databurst broadcast registrations (e.g., if the base station advertises that it will not accept databurst broadcast registrations). If the base station does not reject the databurst broadcast registration message transmitted on the second channel 332, the timer 232 is reset 322 and processing returns to await detection of one of the predetermined events 302, 304, 306, a request to establish a second channel 312 or completion of the broadcast signals on the broadcast channel 316. If the base station rejects the databurst broadcast registration message transmitted on the second channel 332 or if the base station advertises that it will not accept databurst broadcast registrations, the databurst reject flag is set 334; and the portable communication device is asynchronously registered with the base station. Asynchronous registration is utilized when the databurst reject flag is set 324, 334. First, the controller 212 freezes 336 the channel signal power controller 240. Then, the controller 212 signals the channel selector 236 to switch (i.e., slew) the transmitter circuitry 208 from the second channel to the broadcast reverse link access channel 338. Next, the controller 212 provides an asynchronous registration message to the transmitter circuitry 208 for transmission on the reverse link access 14 WO 2007/027309 PCT/US2006/027846 channel 340 after which the controller 212 signals the channel selector 236 to slew the transmitter circuitry from the reverse link access channel back to the second channel 342. The controller 212 then restarts 344 the channel signal power controller 240. The power control may be restarted at the level it was frozen at, at an average level over a time period such as 20mS, or one of these levels plus an offset, such as 5dB. Asynchronous registration from step 336 to step 344 in accordance with the present invention takes less than two seconds and is barely noticeable to the user on the second channel. After asynchronous registration, the timer 232 is reset 322 and processing returns to await detection of one of the predetermined events 302, 304, 306, a request to establish a second channel 312 or completion of the broadcast signals on the broadcast channel 316. While at least one exemplary embodiment has been presented in the foregoing detailed description of the invention, it should be appreciated that a vast number of variations exist. For example, a voice channel may exist on a first system, such as a CDMA cellular communication system and a broadcast channel may exist on a second system such as WiFi local communication system. It is also to be understood that the voice channel could refer to any data channel which communicates information to the mobile device. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing an exemplary embodiment of 15 WO 2007/027309 PCT/US2006/027846 the invention, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope of the invention as set forth in the appended claims. 16 WO 2007/027309 PCT/US2006/027846 CLAIMS What is claimed is: 1. A method for registering a portable communication device on a broadcast channel in a communication system comprising a portable communication device capable of receiving broadcast information on a first channel and for also communicating on a second channel, the method comprising the steps of: determining whether a predetermined event requiring registration of the portable communication device on the first channel has been detected; when the predetermined event has been detected, determining whether the portable communication device is communicating on the second channel; registering the portable communication device on the first channel by transmitting a registration message on the reverse link of the first channel if the communication device is not communicating on the second channel; and registering the portable communication device on the second channel by transmitting a registration message thereon if the portable communication device is communicating on the second channel. 2. The method of Claim 1 wherein the step of determining whether a predetermined event has been detected comprises the step of determining whether a message has been received by the portable communication device requiring the portable communication device to register. 17 WO 2007/027309 PCT/US2006/027846 3. The method of Claim 1 wherein the step of determining whether a predetermined event has been detected comprises the step of determining whether a predetermined time has passed since a previous registration. 4. The method of Claim 1 wherein the step of determining whether a predetermined event has been detected comprises the step of determining whether the portable communication device is moving out of a coverage area of a base station transmitting the broadcast information on the first channel. 5. The method of Claim 1 wherein the step of registering the portable communication device on the second channel comprises the step of transmitting a databurst broadcast registration on the second channel to a base station. 6. The method of Claim 5 wherein the step of transmitting a databurst broadcast registration comprises the steps of: generating a broadcast registration message; loading the broadcast registration message into a databurst container; and transmitting the broadcast registration message as a packet of information multiplexed with other information on the second channel to the base station. 7. The method of Claim 5 further comprising the steps of: determining that the base station has rejected the databurst broadcast registration on the second channel; and asynchronously registering the portable communication device with a base station on the first channel. 18 WO 2007/027309 PCT/US2006/027846 8. The method of Claim 7 wherein the step of asynchronously registering the portable communication device comprises the steps of: freezing transmitter power control; slewing to the first channel; transmitting an asynchronous registration message on the first channel; slewing back to the second channel; and restarting transmitter power control. 9. The method of claim 5 further comprising the steps of: determining that the base station will not accept a databurst broadcast registration on the second channel; and asynchronously registering the portable communication device with a base station on the first channel. 19 WO 2007/027309 PCT/US2006/027846 10. A portable communication device comprising: at least one antenna for receiving signals and for transmitting signals therefrom; first receiver circuitry coupled to the at least one antenna for receiving, demodulating and decoding signals on a broadcast channel to derive broadcast information therefrom, the broadcast channel having a reverse link access channel associated therewith; second receiver circuitry coupled to the at least one antenna for receiving, demodulating and decoding signals on a second channel to derive second channel information therefrom; transmitter circuitry coupled to the at least one antenna for encoding, modulating and transmitting signals on either the second channel or the reverse link access channel; a channel selector coupled to the transmitter circuitry for selecting either the second channel or the reverse link access channel for transmitting signals thereon; user interface devices for presenting the second channel information and the broadcast information to a user, wherein the user interface devices also receive inputs from the user; and a controller coupled to the first receiver circuitry and the second receiver circuitry for receiving the broadcast and second channel information therefrom, the controller also coupled to the user interface devices for providing the broadcast and second channel information thereto and for receiving the user inputs therefrom, wherein the controller determines when a predetermined event requiring 20 WO 2007/027309 PCT/US2006/027846 registration of the portable communication device on the broadcast channel has been detected and, in response thereto, provides a signal to the channel selector to transmit a registration message on the reverse link access channel when the portable communication device is not communicating on the second channel and provides a signal to the channel selector to transmit a registration message on the second channel when the portable communication device is communicating on the second channel. 11. The portable communication device of Claim 10 wherein the controller determines that a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected in response to determining that a registration request message has been received. 12. The portable communication device of Claim 10 further comprising a timer coupled to the controller, wherein the controller determines that a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected in response to a signal from the timer that a predetermined time has passed since a previous registration. 21 WO 2007/027309 PCT/US2006/027846 13. The portable communication device of Claim 10 farther comprising an out of coverage area detector coupled to the first receiver circuitry and the controller for determining when the portable communication device is out of range of a base station communicating on the broadcast channel, wherein the controller determines that a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected in response to a signal from the out of coverage area detector that the portable communication device is moving out of a coverage area of the base station. 14. The portable communication device of Claim 10 wherein the controller comprises a databurst container for generating a packet of information from the registration message, the controller providing the packet of information to the transmitter circuitry for transmission of a databurst broadcast registration as the packet of information multiplexed with other information on the second channel when the portable communication device is communicating on the second channel. 22 WO 2007/027309 PCT/US2006/027846 15. The portable communication device of Claim 14 wherein the controller further comprises a channel signal power controller for controlling the signal power on the second channel, and wherein the controller, in response to determining that the base station has rejected the databurst broadcast registration on the second channel, (a) freezes the second channel signal power controller, (b) signals the channel selector to switch the transmitter circuitry from the second channel to the reverse link access channel, (c) provides an asynchronous registration message to the transmitter circuitry for transmission on the reverse link access channel therefrom, (d) signals the channel selector to switch the transmitter circuitry from the reverse link access channel back to the second channel, and (e) restarts the second channel signal power controller. 16. The portable communication device of Claim 14 wherein the controller further comprises a second channel signal power controller for controlling the signal power on the second channel, and wherein the controller, in response to determining that the base station will not accept a databurst broadcast registration on the second channel, (a) freezes the second channel signal power controller, (b) signals the channel selector to switch the transmitter circuitry from the second channel to the reverse link access channel, (c) provides an asynchronous registration message to the transmitter circuitry for transmission on the reverse link access channel therefrom, (d) signals the channel selector to switch the transmitter circuitry from the reverse link access channel back to the second channel, and (e) restarts the second channel signal power controller. 23 A method and apparatus is provided for simultaneously accessing a broadcast channel which allows for maintaining registration on the broadcast channel and a second channel. The broadcast channel includes a reverse link access channel for a portable communication device (120) to send registration messages to a base station and the method initially includes the step of determining whether a predetermined event requiring registration of the portable communication device on the broadcast channel has been detected (302, 304, 306). After detecting the predetermined event, it is determined whether the portable communication device is communicating on the second channel (308). If not communicating on the second channel (308), registration on the broadcast channel is accomplished by transmitting a registration message on the reverse link access channel (320). If communicating on the second channel (308), the registration message is transmitted on the broadcast channel asynchronously (340) or, if supported by the base station (110), as a databurst of a packet of information on the second channel (330).

Full Text

WO 2007/027309 PCT/US2006/027846
METHOD AND APPARATUS FOR SIMULTANEOUSLY
COMMUNICATING ON A VOICE CHANNEL AND BROADCAST
CHANNEL
FIELD OF THE INVENTION
The present invention generally relates to portable communication devices,
and more particularly relates to a method and apparatus for a portable
communication device to maintain registration with base stations when a voice
channel and a broadcast channel are both in use.
BACKGROUND OF THE INVENTION
Today's portable communication devices have a multitude of functions in
addition to the traditional point-to-point audio communications. Modern portable
communication devices can receive and transmit multimedia signals, such as
photos or videos, with or without accompanying audio. In addition, multimedia
signals could be communicated in conventional point-to-point communication or
could be broadcast simultaneously to a number of portable communication devices
in a communication system. For example, a concert or a sporting event could be
broadcast as multimedia signals on a broadcast channel to multiple portable
communication devices which have subscribed to such services. The portable
communication devices periodically register with base stations in the
communication system to continue receiving the broadcasted multimedia signals
by transmitting registration messages. Portable communication devices, when
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receiving such signals on a broadcast channel on a first frequency, may wish to
initiate point-to-point communication on a voice channel on a second frequency
without terminating reception of the broadcasted signals on the broadcasting
channel. However, the transmitter necessary for the point-to-point communication
is being utilized to transmit the registration messages necessary to continue
receiving the broadcast channel.
Thus, what is needed is a method and apparatus for simultaneously
accessing a voice channel and a broadcast channel which allows for maintaining
registration on the broadcast channel. Furthermore, other desirable features and
characteristics of the present invention will become apparent from the subsequent
detailed description of the invention and the appended claims, taken in conjunction
with the accompanying drawings and this background of the invention.
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BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will hereinafter be described in conjunction with the
following drawing figures, wherein like numerals denote like elements, and
FIG. 1 is a block diagram of a communication system in accordance with
an embodiment of the present invention;
FIG. 2 is a block diagram of a portable communication device of the
communication system of FIG. 1 in accordance with the embodiment of the present
invention; and
FIG. 3 is a flowchart of the broadcast registration maintenance operation of
the portable communication device of FIG. 2 in accordance with the embodiment
of the present invention.
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DETAILED DESCRIPTION OF THE INVENTION
A method for simultaneously accessing broadcast communication on a first
channel and other communication on a second channel is provided which allows
for maintaining registration on the first channel. The first channel includes a
reverse link access channel for a portable communication device to send
registration messages to a base station and the method initially includes the step of
determining whether a predetermined event requiring registration of the portable
communication device on the first channel has been detected. The predetermined
event may be reception of a message from the base station requiring the portable
communication device to register on the first channel, or determination that a
predetermined time has passed since a previous registration, or determination that
the portable communication device is moving out of a coverage area of the base
station. Next, the method in accordance with the present invention, after detecting
the predetermined event, determines whether the portable communication device is
communicating on a second channel. If not cornmunicating on a second channel,
the portable communication device is registered on the first channel by
transmitting a registration message on the reverse link access channel. If
communicating on the second channel, the portable communication device is
registered on the first channel by transmitting a registration message on the second
channel, such as transmitting a databurst broadcast registration on the second
channel.
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When transmitting a databurst broadcast registration on the second channel,
a broadcast registration message is first generated. Then the broadcast message is
loaded into a databurst container and, thereafter, transmitted as a packet of
information multiplexed with other information on the second channel. If the base
station rejects databurst registration on the second channel or does not accept
databurst communication, the portable communication device is asynchronously
registered with the base station by, for example, freezing power control of the
transmitter, slewing the transmitter to the first channel frequency, transmitting an
asynchronous registration message on the first channel, slewing back to the second
channel frequency, and restarting the transmitter power control.
A portable communication device for simultaneously accessing a broadcast
channel and another channel is also provided which allows for maintaining
registration on the broadcast channel. The portable communication device
includes an antenna, first and second receiver circuitry, transmitter circuitry, a
transmitter channel selector, user interface devices and a controller. The antenna
receives and transmits signals and is coupled to the first receiver circuitry which
receives, demodulates and decodes signals on a broadcast channel to derive
broadcast information therefrom, the second receiver circuitry which receives,
demodulates and decodes signals on a second channel to derive second channel
information therefrom, and the transmitter circuitry which encodes, modulates and
transmits signals on either a reverse link access channel associated with the
broadcast channel or on the second channel. The channel selector is coupled to the
transmitter circuitry for selecting either the broadcast reverse link access channel
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or the second channel for transmitting signals thereon and the user interface
devices present the second channel information and the broadcast information to a
user and also receive inputs from the user.
The controller is coupled to the first receiver circuitry and the second
receiver circuitry for receiving the broadcast and second channel information
therefrom and also coupled to the user interface devices for providing the
broadcast and second channel information thereto and for receiving the user inputs
therefrom. When the controller determines that a predetermined event requiring
registration of the portable communication device on the broadcast channel has
been detected, it provides a signal to the channel selector to transmit a registration
message on the broadcast reverse link access channel if the portable
communication device is not communicating on the second channel and provides a
signal to the channel selector to transmit a registration message on the second
channel if the portable communication device is communicating on the second
channel.
A predetermined event requiring registration of the portable
communication device on the broadcast channel could be reception of a
registration request message, reception of a signal from a timer coupled to the
controller indicating that a predetermined time has passed since a previous
registration, or reception of a signal from an out of coverage area detector coupled
to the first and second receiver circuitry and the controller indicating that the
portable communication device is moving out of a coverage area of the base
station.
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The controller includes a databurst container which generates a packet of
information from the registration message and a channel signal power controller
for controlling the signal power on the second channel. The controller can then
provide the packet of information to the transmitter circuitry for transmission of a
databurst broadcast registration as a packet of information multiplexed with the
second channel information on the second channel when the portable
communication device is communicating on thereon. In addition, when the base
station has rejected the databurst broadcast registration on the second channel or if
the second channel base station advertises that it will not accept databurst
broadcast registrations, the controller transmits the registration message to the base
station asynchronously by, for example, (a) freezing the channel signal power
controller, (b) signaling the channel selector to switch the transmitter circuitry
from the second channel to the reverse link access channel, (c) providing an
asynchronous registration message to the transmitter circuitry for transmission on
the reverse link access channel therefrom, (d) signaling the channel selector to
switch the transmitter circuitry from the reverse link access channel back to the
second channel, and (e) restarting the channel signal power controller.
A communication system is also provided which includes a plurality of
base stations having a coverage area associated therewith for communicating on
broadcast channels and second channels therein with a portable communication
device as described above.
The following detailed description of the invention is merely exemplary in
nature and is not intended to limit the invention or the application and uses of the
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invention. Furthermore, there is no intention to be bound by any theory presented
in the preceding background of the invention or the following detailed description
of the invention.
Referring to FIG. 1, a communication system 100 in accordance with an
embodiment of the present invention includes a plurality of base stations 110 and a
portable communication device 120. The plurality of base stations 100
communicate with the portable communication device 120 on channels for
conventional point-to-point communications and on broadcast channels for
broadcasting multimedia signals to multiple portable communication devices 120
which have subscribed to such services. Associated with each of the plurality of
base stations 110 is a coverage area 125 wherein the portable communication
device 120 can receive signals from and transmit signals to such one of the
plurality of base stations on either a broadcast channel or another channel. While
FIG. 1 depicts a single communication for supporting both broadcast
communication on one channel and other communication on a second channel, the
present invention is equally applicable to use in two overlapping communication
systems where one system supports broadcast communication and a second
communication system supports communication on a second channel.
Referring to FIG. 2, a portable communication device 120 in accordance
with the embodiment of the present invention is shown. The portable
communication device 120 includes an antenna 202 for receiving and transmitting
radio frequency (RF) signals. A receive/transmit switch 204 selectively couples
the antenna 202 to first receiver circuitry 206 and transmitter circuitry 208 in a
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manner familiar to those skilled in the art. The receive/transmit switch 204 may
also consist of diplex circuitry to connect the antenna 202 to the receivers 206, 210
and transmitter 208 as is well known to those skilled in the art. In accordance with
the present invention, second receiver circuitry 210 is also coupled to the
receive/transmit switch 204. The second receiver 210 may also be connected to a
second antenna instead of the receive/transmit switch 204 for reception of signals
from a different communication system (e.g., a local or WiFi communication
system). The first receiver circuitry 206 and the second receiver circuitry 210
demodulate and decode the RF signals to derive information and are coupled to a
controller 212 for providing the decoded information thereto for utilization thereby
in accordance with the function(s) of the portable communication device 120. The
controller 212 also provides information to the transmitter circuitry 208 for
encoding and modulating information into RF signals for transmission from the
antenna 202. In accordance with the present invention, the portable
communication device 120 includes diversity receivers whereby the first receiver
circuitry 206 and the transmitter circuitry 208 could support a broadcast channel on
a first frequency, while the second receiver circuitry 210 could be tuned to a
second channel.
The controller 212 is coupled to user interface circuitry 214 including, for
example, a display 218 for presenting video output to a user, user controls 216,
such as a keypad, for receiving user input thereon, a microphone 220 for receiving
voice input which is converted to digital signals by an analog-to-digital (A/D)
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converter 222, and a speaker 224 for providing audio output to the user after
passing signals through a digital-to-analog (D/A) converter 226.
The controller 212 is further coupled to a nonvolatile memory device 228
for storing information therein and for retrieving and utilizing information
therefrom. Additionally, the controller 212 is coupled to a clock 230 for receiving
a clock signal therefrom and to a registration timer 232 for providing a signal to the
controller 212 after a predetermined time has passed after registering with the base
station 110 (FIG. 1).
An out of area detector 234 monitors the strength of the received signals at
the first and/or second receiver circuitry 206, 210 to determine when the portable
communication device 120 is moving out of a coverage area 125 of one of the
plurality of base stations 110 (FIG. 1). Additionally, the controller 212 signals a
channel selector 236 to switch the operational channel of the transmitter circuitry
208. In accordance with the present invention, the channel selector 236 can switch
the transmitter circuitry 208 from transmitting signals on the reverse link access
channel of the broadcast channel to transmitting on the second channel.
In addition to other functionality, the controller 212 includes a databurst
container 238 for generating packet information for providing to the transmitter
circuitry 208 for transmission of a databurst message as a packet of information
multiplexed with voice information. The controller 212 further includes a channel
signal power controller 240 for controlling the power of the signal provided to the
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transmitter circuitry 208 when the transmitter circuitry 208 is tuned to the second
channel.
When receiving broadcast signals, the portable communication device 120
must periodically register with one of the plurality of base stations 110 to continue
to receive the broadcast signals. The operation of the broadcast registration
maintenance routine 300 of the controller 212 is depicted in the flowchart of FIG.
3. Initially, the controller 212 determines whether a predetermined event requiring
registration of the portable communication device 120 on the broadcast channel
has been detected by determining whether a registration request message has been
received from the base station 302 requiring the portable communication device
120 to register on the broadcast channel, or determining whether a signal from the
timer 232 indicates that a predetermined time has passed since a previous
registration 304, or determining whether a signal from the out of area detector 234
indicates that the portable communication device 120 is moving out of a coverage
area 125 of the one of the plurality of base stations 110 with which the portable
communication device 120 is registered 306. When one of the predetermined
events has been detected 302, 304, 306, processing next determines whether the
portable communication device 120 is communicating on a second channel 308,
such as a voice channel.
Not all of the plurality of base stations support databurst communication.
A databurst reject flag can be set to indicate the one of the plurality of base stations
110 with which the portable communication device 120 is communicating doe's not
support databurst communication. When processing determines that a signal from
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the out of area detector 234 indicates that the portable communication device 120
is moving out of a coverage area 125 of the one of the plurality of base stations 110
with which the portable communication device 120 is registered 306, the databurst
reject flag is unset 310 before the second channel communication deterrnining step
308.
If none of the predetermined events has been detected 302, 304, 306,
processing determines whether the portable communication device 120 wishes to
establish communication on a second channel 312 while receiving the broadcast
signals, such as when the user inputs a number to initiate a telephone call. If the
portable communication device 120 wishes to make a call 312, a second channel
(e.g., a voice channel) is established 314 with the transmitter circuitry 208 and the
second receiver circuitry 210, while the broadcast channel is maintained on the
first receiver circuitry 206. Processing then returns to determine if one of the
predetermined events has been detected 302, 304, 306.
If none of the predetermined events has been detected 302, 304, 306, and a
call is not being established 312, processing determines whether the broadcast is
completed 316 by, for example, determining whether the broadcast signals have
ceased. When the broadcast terminates 316, registration on the broadcast channel
does not need to be maintained and the broadcast channel registration maintenance
routine ends 318. If the broadcast is not complete 316, processing returns to
determine if one of the predetermined events has been detected 302, 304, 306.
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After one of the predetermined events has been detected 302, 304, 306, if
the controller 212 determines that the portable communication device 120 is not
communicating on a second channel 308, the transmitter circuitry 208 is free so the
portable communication device 120 can be registered on the broadcast channel by
transmitting a registration message on the reverse link access channel 320. The
timer 232 is then reset 322 to begin measuring the predetermined time to
transmission of the next registration message. Processing then returns to await
detection of one of the predetermined events 302, 304, 306, a request to establish a
second channel 312 or completion of the broadcast signals on the broadcast
channel 316.
If, on the other hand, the controller 212 determines that the portable
communication device 120 is communicating on a second channel 308, the
databurst reject flag is checked to determine if it is set 324 indicating that the base
station does not support databurst communication. If the databurst reject flag is
not set 324, the broadcast registration message is generated 326 and loaded 328
into the databurst container 238. In accordance with the present invention, the
databurst container 238 for broadcast registration generates a packet of information
as a databurst broadcast registration message 328. The databurst broadcast
registration message is then multiplexed with second channel information and
provided to the transmitter circuitry 208 for transmission therefrom on the second
channel 330. Specifically, the burst type 000111 parameter for Third generation
CDMA2000 (currently unassigned) could be assigned to "Broadcast Support" (see
Table 4.1-1 on page 4-1 of Standard C.R1001-D, 3GPP2) and the databurst
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container 238 would packetize the broadcast registration message into a packet of
information and the packet of information would be transmitted over the voice
channel using dim_burst/Blanlc_burst as provided in existing standards 330.
Next the controller 212 determines from information received whether the
base station has rejected the databurst broadcast registration message 332.
Alternatively, the controller 212 may have set the databurst reject flag if the
controller 212 has determined that the base station does not accept databurst
broadcast registrations (e.g., if the base station advertises that it will not accept
databurst broadcast registrations). If the base station does not reject the databurst
broadcast registration message transmitted on the second channel 332, the timer
232 is reset 322 and processing returns to await detection of one of the
predetermined events 302, 304, 306, a request to establish a second channel 312 or
completion of the broadcast signals on the broadcast channel 316. If the base
station rejects the databurst broadcast registration message transmitted on the
second channel 332 or if the base station advertises that it will not accept databurst
broadcast registrations, the databurst reject flag is set 334; and the portable
communication device is asynchronously registered with the base station.
Asynchronous registration is utilized when the databurst reject flag is set
324, 334. First, the controller 212 freezes 336 the channel signal power controller
240. Then, the controller 212 signals the channel selector 236 to switch (i.e., slew)
the transmitter circuitry 208 from the second channel to the broadcast reverse link
access channel 338. Next, the controller 212 provides an asynchronous registration
message to the transmitter circuitry 208 for transmission on the reverse link access
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channel 340 after which the controller 212 signals the channel selector 236 to slew
the transmitter circuitry from the reverse link access channel back to the second
channel 342. The controller 212 then restarts 344 the channel signal power
controller 240. The power control may be restarted at the level it was frozen at, at
an average level over a time period such as 20mS, or one of these levels plus an
offset, such as 5dB. Asynchronous registration from step 336 to step 344 in
accordance with the present invention takes less than two seconds and is barely
noticeable to the user on the second channel.
After asynchronous registration, the timer 232 is reset 322 and processing
returns to await detection of one of the predetermined events 302, 304, 306, a
request to establish a second channel 312 or completion of the broadcast signals on
the broadcast channel 316.
While at least one exemplary embodiment has been presented in the
foregoing detailed description of the invention, it should be appreciated that a vast
number of variations exist. For example, a voice channel may exist on a first
system, such as a CDMA cellular communication system and a broadcast channel
may exist on a second system such as WiFi local communication system. It is also
to be understood that the voice channel could refer to any data channel which
communicates information to the mobile device. It should also be appreciated that
the exemplary embodiment or exemplary embodiments are only examples, and are
not intended to limit the scope, applicability, or configuration of the invention in
any way. Rather, the foregoing detailed description will provide those skilled in
the art with a convenient road map for implementing an exemplary embodiment of
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the invention, it being understood that various changes may be made in the
function and arrangement of elements described in an exemplary embodiment
without departing from the scope of the invention as set forth in the appended
claims.
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CLAIMS
What is claimed is:
1. A method for registering a portable communication device on a broadcast
channel in a communication system comprising a portable communication device
capable of receiving broadcast information on a first channel and for also
communicating on a second channel, the method comprising the steps of:
determining whether a predetermined event requiring registration of the
portable communication device on the first channel has been detected;
when the predetermined event has been detected, determining whether the
portable communication device is communicating on the second channel;
registering the portable communication device on the first channel by
transmitting a registration message on the reverse link of the first channel if the
communication device is not communicating on the second channel; and
registering the portable communication device on the second channel by
transmitting a registration message thereon if the portable communication device is
communicating on the second channel.
2. The method of Claim 1 wherein the step of determining whether a
predetermined event has been detected comprises the step of determining whether
a message has been received by the portable communication device requiring the
portable communication device to register.
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3. The method of Claim 1 wherein the step of determining whether a
predetermined event has been detected comprises the step of determining whether
a predetermined time has passed since a previous registration.
4. The method of Claim 1 wherein the step of determining whether a
predetermined event has been detected comprises the step of determining whether
the portable communication device is moving out of a coverage area of a base
station transmitting the broadcast information on the first channel.
5. The method of Claim 1 wherein the step of registering the portable
communication device on the second channel comprises the step of transmitting a
databurst broadcast registration on the second channel to a base station.
6. The method of Claim 5 wherein the step of transmitting a databurst
broadcast registration comprises the steps of:
generating a broadcast registration message;
loading the broadcast registration message into a databurst container; and
transmitting the broadcast registration message as a packet of information
multiplexed with other information on the second channel to the base station.
7. The method of Claim 5 further comprising the steps of:
determining that the base station has rejected the databurst broadcast
registration on the second channel; and
asynchronously registering the portable communication device with a base
station on the first channel.
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8. The method of Claim 7 wherein the step of asynchronously registering the
portable communication device comprises the steps of:
freezing transmitter power control;
slewing to the first channel;
transmitting an asynchronous registration message on the first channel;
slewing back to the second channel; and
restarting transmitter power control.
9. The method of claim 5 further comprising the steps of:
determining that the base station will not accept a databurst broadcast
registration on the second channel; and
asynchronously registering the portable communication device with a base
station on the first channel.
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10. A portable communication device comprising:
at least one antenna for receiving signals and for transmitting signals
therefrom;
first receiver circuitry coupled to the at least one antenna for receiving,
demodulating and decoding signals on a broadcast channel to derive broadcast
information therefrom, the broadcast channel having a reverse link access channel
associated therewith;
second receiver circuitry coupled to the at least one antenna for receiving,
demodulating and decoding signals on a second channel to derive second channel
information therefrom;
transmitter circuitry coupled to the at least one antenna for encoding,
modulating and transmitting signals on either the second channel or the reverse
link access channel;
a channel selector coupled to the transmitter circuitry for selecting either
the second channel or the reverse link access channel for transmitting signals
thereon;
user interface devices for presenting the second channel information and
the broadcast information to a user, wherein the user interface devices also receive
inputs from the user; and
a controller coupled to the first receiver circuitry and the second receiver
circuitry for receiving the broadcast and second channel information therefrom, the
controller also coupled to the user interface devices for providing the broadcast and
second channel information thereto and for receiving the user inputs therefrom,
wherein the controller determines when a predetermined event requiring
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registration of the portable communication device on the broadcast channel has
been detected and, in response thereto, provides a signal to the channel selector to
transmit a registration message on the reverse link access channel when the
portable communication device is not communicating on the second channel and
provides a signal to the channel selector to transmit a registration message on the
second channel when the portable communication device is communicating on the
second channel.
11. The portable communication device of Claim 10 wherein the controller
determines that a predetermined event requiring registration of the portable
communication device on the broadcast channel has been detected in response to
determining that a registration request message has been received.
12. The portable communication device of Claim 10 further comprising a timer
coupled to the controller, wherein the controller determines that a predetermined
event requiring registration of the portable communication device on the broadcast
channel has been detected in response to a signal from the timer that a
predetermined time has passed since a previous registration.
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13. The portable communication device of Claim 10 farther comprising an out
of coverage area detector coupled to the first receiver circuitry and the controller
for determining when the portable communication device is out of range of a base
station communicating on the broadcast channel, wherein the controller determines
that a predetermined event requiring registration of the portable communication
device on the broadcast channel has been detected in response to a signal from the
out of coverage area detector that the portable communication device is moving
out of a coverage area of the base station.
14. The portable communication device of Claim 10 wherein the controller
comprises a databurst container for generating a packet of information from the
registration message, the controller providing the packet of information to the
transmitter circuitry for transmission of a databurst broadcast registration as the
packet of information multiplexed with other information on the second channel
when the portable communication device is communicating on the second channel.
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15. The portable communication device of Claim 14 wherein the controller
further comprises a channel signal power controller for controlling the signal
power on the second channel, and wherein the controller, in response to
determining that the base station has rejected the databurst broadcast registration
on the second channel, (a) freezes the second channel signal power controller, (b)
signals the channel selector to switch the transmitter circuitry from the second
channel to the reverse link access channel, (c) provides an asynchronous
registration message to the transmitter circuitry for transmission on the reverse link
access channel therefrom, (d) signals the channel selector to switch the transmitter
circuitry from the reverse link access channel back to the second channel, and (e)
restarts the second channel signal power controller.
16. The portable communication device of Claim 14 wherein the controller
further comprises a second channel signal power controller for controlling the
signal power on the second channel, and wherein the controller, in response to
determining that the base station will not accept a databurst broadcast registration
on the second channel, (a) freezes the second channel signal power controller, (b)
signals the channel selector to switch the transmitter circuitry from the second
channel to the reverse link access channel, (c) provides an asynchronous
registration message to the transmitter circuitry for transmission on the reverse link
access channel therefrom, (d) signals the channel selector to switch the transmitter
circuitry from the reverse link access channel back to the second channel, and (e)
restarts the second channel signal power controller.
23

A method and apparatus is
provided for simultaneously accessing a broadcast
channel which allows for maintaining registration
on the broadcast channel and a second channel.
The broadcast channel includes a reverse link
access channel for a portable communication
device (120) to send registration messages to
a base station and the method initially includes
the step of determining whether a predetermined
event requiring registration of the portable
communication device on the broadcast channel
has been detected (302, 304, 306). After
detecting the predetermined event, it is determined
whether the portable communication device is
communicating on the second channel (308).
If not communicating on the second channel
(308), registration on the broadcast channel
is accomplished by transmitting a registration
message on the reverse link access channel (320).
If communicating on the second channel (308),
the registration message is transmitted on the
broadcast channel asynchronously (340) or, if
supported by the base station (110), as a databurst
of a packet of information on the second channel
(330).

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=OXmpI6aLhqfa+EFWiAIfWw==&loc=wDBSZCsAt7zoiVrqcFJsRw==

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Patent Number

271990

Indian Patent Application Number

298/KOLNP/2008

PG Journal Number

12/2016

Publication Date

18-Mar-2016

Grant Date

14-Mar-2016

Date of Filing

21-Jan-2008

Name of Patentee

MOTOROLA, INC.

Applicant Address

1303 EAST ALGONQUIN ROAD, SCHAUMBURG, ILLINOIS

Inventors:

#	Inventor's Name	Inventor's Address
1	ALBERTH WILLIAM P, JR.	2806 CRYSTAL WAY, CRYSTAL LAKE, ILLINOIS 60012
2	KRAUSE DAVID J	6105 82ND AVENUE, KENOSHA, WISCONSIN 53142

PCT International Classification Number

H04Q 7/38

PCT International Application Number

PCT/US2006/027846

PCT International Filing date

2006-07-18

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	11/215916	2005-08-30	U.S.A.