WO1999010985A2 - Method and apparatus for processing power control signals in a mobile telephone system - Google Patents

Method and apparatus for processing power control signals in a mobile telephone system Download PDF

Info

Publication number
WO1999010985A2
WO1999010985A2 PCT/US1998/017528 US9817528W WO9910985A2 WO 1999010985 A2 WO1999010985 A2 WO 1999010985A2 US 9817528 W US9817528 W US 9817528W WO 9910985 A2 WO9910985 A2 WO 9910985A2
Authority
WO
WIPO (PCT)
Prior art keywords
mobile telephone
power
signal
power control
base station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1998/017528
Other languages
English (en)
French (fr)
Other versions
WO1999010985A3 (en
Inventor
Keith W. Saints
Edward G. Tiedemann, Jr.
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to EP98943361A priority Critical patent/EP1010258B1/en
Priority to AU91180/98A priority patent/AU9118098A/en
Priority to KR1020007002145A priority patent/KR100683356B1/ko
Priority to HK00107897.9A priority patent/HK1029677B/en
Priority to DE69836031T priority patent/DE69836031T2/de
Priority to JP2000556554A priority patent/JP4278304B2/ja
Publication of WO1999010985A2 publication Critical patent/WO1999010985A2/en
Publication of WO1999010985A3 publication Critical patent/WO1999010985A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates generally to a method and apparatus for controlling the transmission power of mobile telephones in mobile telephone systems.
  • the invention is suitable for use in code division multiple access (CDMA) based systems.
  • CDMA code division multiple access
  • CDMA code division multiple access
  • mobile telephones in the system using CDMA spread-spectrum principles transmit their signals over the air to base stations in the system. Details of a preferred CDMA system are set forth in U.S. Patent No. 4,901,307 for an invention entitled “Spread Spectrum Multiple Access Communication System Using Satellite or Terrestrial Repeaters” and U.S. Patent No. 5,103,459 entitled “System and Method for Generating Signal Waveforms in a CDMA Cellular Telephone System", assigned to the same assignee as is the present invention and incorporated herein by reference.
  • CDMA transmission for use in cellular communication has been standardized by the Telecommunications Industry Association publication no. TJA/EIA/IS- 95-A, entitled “A Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System (hereinafter "IS-95- A").
  • each user's signal is noise to every other user, and providing for roughly equal mobile station signal power at the base station insures that no single mobile station is disproportionately contributing to the interference of other mobile stations.
  • a base station that is communicating with multiple mobile telephones periodically transmits, in a power control subchannel of a traffic channel, a distinct sequence of power control signals to each telephone.
  • a base station transmits power control signals to each mobile telephone by inserting (at a rate of 800 times per second) a single power control bit into the communication signal (referred to herein as the "traffic" signal) being transmitted by the base station.
  • the power control bit will be referred to in the singular, although it is to be understood that the present discussion applies equally to instances wherein two successive power control bits are inserted into the traffic signal.
  • the power control bit is either a logical "one” or a logical “zero”, with the logic states respectively representing commands to the mobile telephone to increase or decrease the amplitude of its transmitted power by a predeterrnined unit amount of power. Details of such a system are set forth in U.S. Patent No. 5,506,109 entitled “Method and Apparatus for Controlling Power in a CDMA Cellular Mobile Telephone System", assigned to the same assignee as is the present invention and incorporated herein by reference.
  • Multipath Signals from a base station to a mobile telephone might arrive at the mobile telephone over more than one transmission path, a phenomenon referred to as "multipath". More specifically, a base station signal might propagate over a relatively direct path to a mobile telephone, and it also might propagate over an indirect path, being reflected by buildings and the like. Each version of the signal received over a particular signal path is colloquially referred to as a "finger".
  • a base station signal might propagate over a relatively direct path to a mobile telephone, and it also might propagate over an indirect path, being reflected by buildings and the like.
  • Each version of the signal received over a particular signal path is colloquially referred to as a "finger".
  • diversity receivers have been provided that are capable of independently demodulating each of the multipath signals and combining the demodulated signals to provide an improved estimate of the information contained in the multipath signal.
  • a preferred diversity receiver is disclosed in U.S. Patent No. 5,109,390 entitled "Diversity Receiver in
  • a CDMA mobile telephone includes a type of diversity receiver known as a rake receiver in which a searcher assigns a received finger to a respective one of a plurality of CDMA demodulators in a first set of demodulators, with the first set being assigned to fingers of a first base station. It is possible to know which fingers correspond to which base station, because the encoding systems (i.e., the pseudorandom noise (PN) generators) of the base stations are staggered from each other by a known and relatively large amount, generally represented as a number of PN "chips".
  • PN pseudorandom noise
  • a mobile station that is in soft handoff with two or more base stations receives the same data signal over traffic channels from each base station, but receives independent power control commands in the power control subchannels from the respective base stations. Consequently, it can happen that one base station might command the mobile telephone to increase its transmitted power, whereas another base station might simultaneously command the mobile telephone to decrease its transmitted power.
  • a mobile station conforming to the IS/95-A standard is required to decrease its power if any base station issues a "decrease" power control command, regardless of what the other base stations might command. This convention is colloquially referred to in logic terms as the "OR of the downs" rule. There aie two situations in which a mobile station can receive multiple signal components that contain the same power control command.
  • the first is when a mobile station receives two or more multipath signal components from the same base station, in which case it is clear that the power control bits contained in each component are identical. Additionally, when sectorized base stations are used, and a mobile station receives signals from two or more sectors of the same base station (a situation commonly referred to as a "softer" handoff), identical power control bits are transmitted from each sector. In either case, the mobile station combines all received power control signals that originate from the same base station to yield a single overall estimate of the power control command sent from that base station. This combining of power control signals increases the reliability of the estimate of the command, and it is performed before applying the "OR of the downs" rule to independent power control bits that have been received from different base stations.
  • a mobile station When power control signals from multiple base stations have been received by a mobile station, if the signal from one of the base stations is insufficient for the mobile station to make a reliable decision for the command represented by the respective power control signal, the mobile station should exclude the base station's power control command from the "OR of the downs" rule. Otherwise, the decision rendered from the weak signal, while being consequently unreliable, would nevertheless have influence in controlling the mobile station's transmitted power. Therefore, a mobile station should have a mechanism for excluding, from consideration in the "OR of the downs" rule, power command decisions that are based on weak power control signals.
  • the invention provides a mobile telephone for receiving signals from a base station, comprising: a searcher; a first demodulator controlled by the searcher for demodulating a first signal from the base station, the first signal propagating to the mobile telephone via a first path; a second demodulator controlled by the searcher for demodulating a second signal from the base station, the second signal propagating to the mobile telephone via a second path; a combiner for combining corresponding power control bits from the first and second signals regardless of whether the respective demodulator is in lock with the respective signal to thereby generate a first power command; and a processor for passing the first power command when a comparison energy at least equals an energy threshold, and otherwise blocking the first power command.
  • the invention provides a mobile telephone for receiving signals from a base station, comprising: a searcher; a first demodulator controlled by the searcher for demodulating a first signal from the base station, the first signal propagating to the mobile telephone via a first path; a second demodulator controlled by the searcher for demodulating a second signal from the base station, the second signal propagating to the mobile telephone via a second path; a combiner for combining corresponding power control bits from the first and second signals regardless of whether the respective demodulator is in lock with the respective signal to thereby generate a first power command; and a processor for passing the first power command when a comparison energy at least equals an energy threshold, and otherwise blocking the first power command.
  • the invention provides a communication device, comprising: a rake receiver including demodulators for demodulating a plurality of fingers of a signal from a base station, the signal including power control bits; and a combiner for combining corresponding power control bits from the demodulators regardless of whether the demodulators are in lock with their respective fingers to thereby generate a first power command.
  • the invention also provides a method for establishing a transmitted power of a mobile telephone in a mobile telephone system having at least first and second base stations, each transmitting a common traffic signal to the mobile telephone, comprising the steps of: demodulating a first finger of the traffic signal from the first base station, the first finger propagating to the mobile telephone via a first path; demodulating a second finger of the traffic signal firom the first base station, the second finger propagating to the mobile telephone via a second path; combining corresponding power control bits from the first and second fingers regardless of the strengths of the fingers to thereby generate a first power command; and passing the first power command when a comparison energy at least equals an energy threshold, and otherwise blocking the first power corrtmand.
  • the invention further provides a method for establishing a transmitted power of a mobile telephone in a mobile telephone system having at least first and second base stations, each transmitting a common traffic signal to the mobile telephone, comprising the steps: demodulating respective signal fingers from the first base station, each signal finger propagating to the mobile telephone via a respective path; and passing a power control bit from a finger only when an energy associated with the finger at least equals an energy threshold, the energy threshold being established in response to the number of fingers.
  • the invention also provides a computer logic device in a mobile telephone for a mobile telephone system having at least first and second base stations, each base station transmitting a common traffic signal to the mobile telephone, the computer logic device comprising: means for demodulating a first finger of the traffic signal from the first base station, the first finger propagating to the mobile telephone via a first path; means for demodulating a second finger of the traffic signal from the first base station, the second finger propagating to the mobile telephone via a second path; means for combining corresponding power control bits from the first and second lingers regardless of the strengths of the fingers to thereby generate a first power command; and means for passing the first power command when a comparison energy at least equals an energy threshold, and otherwise blocking the first power command, thereby to establish transmitted power of the mobile telephone.
  • the invention provides a computer logic device in a mobile telephone for a mobile telephone system having at least first and second base stations, each base station transmitting a common traffic signal to the mobile telephone, the computer logic device comprising: means for demodulating respective signal fingers from the first base station, each signal finger propagating to the mobile telephone via a respective path; and means for passing a power control bit from a finger only when an energy associated with the finger at least equals an energy threshold, the energy threshold being established in response to the number of fingers, thereby to establish transmitted power of the mobile telephone.
  • the inventors have recognised that although weak signals should be excluded from the final decision used in the "OR of the downs" rule, the decision to exclude these weak signals can be deferred until after they have been combined with other signals from the same base station thereby potentially to render a reliable input to the "OR of the downs" logic.
  • all fingers receiving signals from a base station can be considered to form a combined estimate of the power control command from the base station.
  • the aggregate energy from all of the fingers can be compared to a minimum threshold to determine whether the aggregate energy possess sufficient energy to be included in the "OR of the downs" rule.
  • the present invention aims to provide a system for controlling the transmitted power of a mobile telephone.
  • the present invention also aims to provide a system for controlling the transmitted power of a mobile telephone which uses power control bits from rake receiver demodulators that are not necessarily locked onto their respective fingers.
  • the present invention aims to provide a system for controlling the transmitted power of a mobile telephone that is easy to use and cost-effective to manufacture and implement.
  • a mobile telephone for receiving signals from a base station.
  • the mobile telephone includes a searcher and a first demodulator controlled by the searcher for demodulating a first signal from the base station, wherein the first signal propagates to the mobile telephone via a first path.
  • a second demodulator is controlled by the searcher for demodulating a second signal from the base station. The second signal propagates to the mobile telephone via a second path.
  • a combiner combines corresponding power control bits from the first and second signals regardless of whether the respective demodulator is in lock with the respective signal to thereby generate a first power command.
  • a processor passes the first power command when a comparison energy at least equals an energy threshold, and otherwise the processor blocks the first power command.
  • a switch is controlled by the processor for passing and blodang the first power command.
  • the switch is a first switch and the signal can be received from a second base station.
  • the telephone further includes means for generating a second power command in response to the signal received from the second base station.
  • the telephone includes a second switch which is controlled by the processor for passing and blocking the second power command.
  • the telephone preferably includes an OR gate for receiving the power commands and generating a power control signal in response thereto. The power control signal causes an increase or decrease in a transmitted power of the mobile telephone.
  • the comparison energy is based on the energy of the first power command. In an alternate embodiment, the comparison energy is based on the energy of the first and second signals.
  • the telephone is disclosed in combination with a mobile telephone system.
  • a mobile telephone for receiving a signal from a base station includes a searcher and a rake receiver.
  • the rake receiver includes a plurality of demodulators that are controlled by the searcher for demodulating respective signal fingers from the base station, with each signal finger propagating to the mobile telephone via a respective path.
  • a processor passes a power control bit from a signal only when an energy associated with the signal at least equals an energy threshold.
  • the energy threshold is established in response to the number of fingers input to the rake receiver.
  • a communication device includes a rake receiver including demodulators for demodulating a plurality of fingers of a signal from a base station.
  • the signal includes power control bits.
  • a combiner is provided for combining corresponding power control bits from the demodulators regardless of whether the demodulators are in lock with their respective fingers to thereby generate a first power command.
  • a method for establishing a transmitted power of a mobile telephone in a mobile telephone system having at least first and second base stations, with each base station transmitting a common traffic signal to the mobile telephone.
  • the method includes demodulating a first finger of the traffic signal from the first base station, and demodulating a second finger of the traffic signal from the first base station.
  • the method includes combining corresponding power control bits from the first and second fingers regardless of the strengths of the fingers to thereby generate a first power command.
  • the first power command is passed when a comparison energy at least equals an energy threshold, and otherwise the first power command is blocked.
  • a computer logic device is also disclosed which executes some of the above mentioned steps.
  • a method for establishing transmitted power of a mobile telephone in a mobile telephone system having at least first and second base stations, each transmitting a common traffic signal to the mobile telephone includes demodulating respective signal fingers from the first base station, and passing a power control bit from a finger only when an energy associated with the finger at least equals an energy threshold.
  • the energy threshold is established in response to the number of fingers.
  • FIG. 1 is a schematic diagram of the mobile telephone transmission power control system embodying the present invention
  • FIG. 2 is a schematic diagram of one of the demodulators embodying the present invention
  • FIG. 3 is a flow chart showing a preferred power control bit combination method
  • FIG. 4 is a flow chart showing an alternative power control bit combination method.
  • a mobile telephone system is shown, generally designated 10, in which the transmission power of a mobile telephone, generally designated 12, is controlled in accordance with the novel invention disclosed herein.
  • the system 10 includes a plurality of base stations 14. For simplicity, two base stations 14A,
  • system 10 includes a plurality of mobile telephones
  • a base station 14 communicates with the mobile telephone 12 via a traffic channel 16.
  • Base station 14 sends, within its traffic signal, power control bits to mobile telephone 12 which command mobile telephone 12 either to increase or decrease its transmitted power by a predetermined incremental power amount, to improve the total system-wide communication quality with base stations 14.
  • CDMA code division multiple access
  • the mobile telephone 12 includes an antenna 18 and front end circuitry 20 which downconverts, filters, and amplifies the received signal.
  • Signals from the first base station 14A (including both multipath signals and signals from separate sectors of the same base station) are sent to a first portion, generally designated 22, of a rake receiver, while signals from the second base station 14B are sent to a second portion, generally designated 24, of the rake receiver.
  • the rake receiver portions 22, 24 are identical in configuration and operation to each other.
  • the first rake receiver portion 22 includes a plurality of demodulators, with the number of demodulators allocated for the purpose of receiving signals from base station 14A and base station 14B being variable.
  • the first rake receiver portion 22 includes first through third demodulators 25a-c, while the second rake receiver portion 24 includes fourth through sixth demodulators 25d-f.
  • An "A" searcher 26 is connected to the circuitry 20 and to the first through third demodulators 25a-c for assigning respective signal "fingers" from the first base station 14A to the demodulators 25a-c as is described in detail in the above-mentioned U.S. Patent No. 5,109,390.
  • a "B" searcher 27 is connected to the circuitry 20 and to the fourth through sixth demodulators 25d-f for assigning respective signal "fingers" from the second base station 14B to the demodulators 25d-f as is described in detail in the above- mentioned US. Patent No. 5,109,390.
  • the various signal fingers from the first base station 14A are caused by multipath propagation of the signal from the base station 14A to the mobile telephone 12, or from the same signal being received from two directional transmitters, referred to as "sectors", of the same base station.
  • sectors two directional transmitters
  • a mobile station is in simultaneous communication with two sectors of the same base station, the condition, as noted above, is referred to as a "softer" handoff.
  • a method for performing a softer handoff in a CDMA communication system is described in detail in co-pending U.S. patent application serial no. 08/405,611 for and invention entitled “Method and Apparatus for Performing Handoff Between Sectors of a Common Base Station", filed March 5, 1995, assigned to the same assignee as the present invention and incorporated by reference herein.
  • the demodulators 25a-f demodulate their respective fingers in accordance with CDMA demodulation principles well- known in the ait.
  • Each of the first through third demodulators 25a-c sends its demodulated power control bits to an "A" digital power control combiner 28, whereas each of the fourth through sixth demodulators 25d-f sends its demodulated power control bits to a "B" digital power control combiner 29.
  • each of the first through sixth demodulators 25a-f sends its demodulated traffic bits to a common digital traffic combiner 30, which combines fraffic data for the mobile telephone 12 from all base stations 14, since the traffic data from each base station 14 (for the particular mobile telephone 12) is the same as the traffic data for the telephone 12 from the other base stations in the system.
  • the combiners 28, 29, 30 combine the signals sent to them from the demodulators 25a-f .
  • HG. 1 shows that the output of the "A" power control combiner 28 is sent to an "A” energy comparator 32, and the output of the "B" power control combiner 29 is sent to a "B” energy comparator 38.
  • the energy comparators 32, 38 compare the energy of the signals from the respective power control combiners 28, 29 to a predetermined threshold, and send the comparison to a digital processing apparatus, such as a microprocessor 34.
  • the outputs of the energy comparators 32, 38 are binary ones or zeroes, respectively indicating whether the power control command from the particular base station is to increase (an “up” signal) or decrease (a “down” signal) mobile telephone 12 transmitted power.
  • the microprocessor 34 controls the operation of an "A" switch 36 and a "B" switch 40, to either pass or block an "up” or “down” signal from the respective power control combiners 28, 29 in response to the comparison signal from the respective energy comparators 32, 38.
  • the logic by which the microprocessor 34 controls the switches 36, 40 is disclosed further below.
  • a switch 36, 40 passes an "up” or “down” power control signal, the power control signal is sent to a logic combiner 42 as shown. Stated differently, the switches 36, 40 pass to the logic combiner 42 either an "up” or a “down” signal, or a "disable” signal indicating that the microprocessor 34 has disabled the output of the particular switch 36, 0.
  • the logic combiner 42 undertakes the above- disclosed "OR of the downs" logic to output a signal to cause the mobile telephone 12 to increase or decrease its transmitted power. Specifically, when all of the power control signals received by the logic combiner 42 indicate that the transmitter of the mobile telephone 12 is to increase its power, the logic combiner 42 outputs a power command to cause the transmitted power to increase. Otherwise, the logic combiner 42 outputs a power command to cause the transmitted power to decrease.
  • HG. 1 also shows that the microprocessor 34 preferably includes a data storage device 44, which includes instructions that are used by the microprocessor 34 to undertake the steps of the present invention. Accordingly, those skilled in the art will recognize that the microprocessor 34 can include a programmable central processing unit (CPU), or a programmable gate array chip, or an application specific integrated circuit (ASIC).
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • HGS. 3 and 4 illustrate the structures of various embodiments of the logic of the present invention as embodied in computer-readable logic structures on the storage device 44 (HG. 1).
  • HG.s illustrate the structures of logic elements that function according to this invention.
  • the invention is practiced in one essential embodiment by a machine component that renders the logic elements in a form that instructs a digital processing apparatus (that is, a computer or microprocessor) to perform a sequence of operational steps corresponding to those shown in the HGs.
  • These instructions may reside in, i.e., be embodied by, logic structures/circiiits on a data storage device including a data storage medium, such as the storage device 44 shown in HG. 1.
  • the machine component can be a combination of logic elements that are embodied in the storage device 44, which advantageously can be electronic read-only memory (ROM) or electronic random access memory (RAM), or other appropriate data storage device.
  • the instructions can be embodied in the form of computer program code elements on semiconductor devices, on magnetic tape, on optical disks, on a DASD array, on magnetic tape, on a conventional hard disk drive, on electronic read-only memory or on electronic random access memory, or other appropriate data storage device.
  • HG. 2 the structure of a demodulator of the present invention can be seen. It is to be understood that the demodulators of the rake receiver of the present invention are identical to each other in construction and operation. Accordingly, the first demodulator 25a is shown and described in HG. 2 an exemplary demodulator of the present invention.
  • the signal which is input to the demodulator 25a is sent to a digital multiplier 46.
  • the multiplier 46 outputs the product of the input sign d and a pseudorandom noise (PN) code that is generated by a PN generator 48.
  • PN pseudorandom noise
  • the output of the multiplier 46 is sent to a digital accumulator 50.
  • the signal is sent along three paths, the first path including a so-called Walsh demodulator 52 which further processes the signal in accordance with conventional CDMA principles.
  • the signal along the second path is sent to a traffic lock mechanism that includes a traffic energy comparator 54a for comparison of the energy of the signal output from the accumulator 50 with a predetermined threshold.
  • the signal is sent to a digital processing apparatus, such as a traffic controller 56a.
  • the traffic controller 56a controls the operation of a traffic switch 58, the output of which is sent to the common traffic combiner 30 shown in HG. 1.
  • the signal along a third path from the accumulator 50 is sent to a power control lock mechanism that includes a power control energy comparator 54b for comparison of the energy of the signal output from the accumulator 50 with a predetermined threshold.
  • the signal is sent to a digital processing apparatus, such as a power control controller 56b.
  • the power control controller 56b controls the operation of a power control bit switch 60, the output of which is sent to the "A" power control combiner 28 shown in HG. 1.
  • the output of the Walsh demodulator 52 is sent to a digital demultiplexer 62.
  • the demultiplexer 62 separates power control signals in the signal from traffic signals.
  • the power control signals are sent as shown to the power control switch 60, whereas the traffic bits are sent to the traffic switch 58.
  • the power control controller 56b dete ⁇ rdnes whether the first demodulator 25a is "in lock” for power control with its respective signal finger.
  • the power control controller 56b causes the power control switch 60 to pass its power control signal on to the "A" power control combiner 28 shown in HG. 1.
  • the traffic 56a determines whether the first demodulator 25a is "in lock” for traffic data with its respective signal finger.
  • the traffic controller 56a causes traffic switch 58 to pass its traffic signal on to the traffic combiner 30 shown in HG. 1.
  • the traffic controller 56a causes the traffic switch 58 to block the traffic signal from the traffic combiner 30.
  • the power control controller 56b causes the power control switch 60 to nevertheless pass the power control signal to the "A" power control combiner 28.
  • the power control switch 60 can be omitted, or disabled by establishing its threshold to be zero. Or, the power control switch 60 can be combined with the traffic control switch 58 into a single switch (not shown), with the controller 56 operating the switch to selectively pass traffic signals based on whether the demodulator is in lock for traffic control, and with the controller 56 operating the switch to always pass power control signals regardless of whether the demodulator is in lock for power control.
  • HG. 3 the method is shown by which the present invention combines power control bits which are received from a single base station over various multipaths.
  • the multipath signals are received, separately demodulated, and the power control bits demultiplexed therefrom, as disclosed above.
  • the operation of the "A" power control combiner 28 causes all power control signals from a demodulator that is in lock for power control to be combined with corresponding power control signals from the other locked demodulators that are assigned to fingers of a common base station.
  • the microprocessor 34 determines whether the energy of the combined power control signal at least equals a predetermined threshold.
  • tine comparison energy is based on the energy of the combined power control signal received by the "A" energy comparator 32 (HG. 1). In other words, it is the energy of the combined power control signal that can be compared to a threshold at decision diamond 68.
  • the comparison energy can be based on the energy of the sign d fingers prior to demultiplexing, as indicated by the power control energy comparators 54b of the demodulators of the present invention. Or, the energy of the entire received signal, with both traffic and power control signals, can be compared to a threshold at decision diamond 68.
  • the logic of the microprocessor 34 moves to block 70 to operate the "A" switch 36 to block (or to indicate as being disabled) the power control command generated by the "A" power control combiner 28 from passing to the logic combiner 42. If, on the other hand, it is dete ⁇ nined at decision diamond 68 that the energy is at least equal the predetermined threshold, the logic of the microprocessor 34 moves to block 72 to operate the "A" switch 36 to pass the power control command generated by the "A" power control combiner 28 to the logic combiner 42.
  • the energy comparators 32, 38 and switches 36, 40 can be dispensed with.
  • the power control controller 56b (HG. 2) of each demodulator selectively passes power control signals, with the comparison threshold being dynamic_dly established based on the number of received signal fingers.
  • the energy threshold is established in response to the number of signals from a single base station that are input to the rake receiver of the present invention.
  • HG. 4 shows the logic of such an embodiment.
  • the controller 56b of each demodulator determines how many fingers (represented by an integer "F") are currently being received.
  • the predetermined threshold is set equal to its nominal value, divided by the number "F" of fingers being received from the base station.
  • each demodulator controller 56b determines whether the pilot energy of its associated finger is at least equal to the threshold determined at block 76. If it isn't, the logic of the controller 56b moves to block 80 to control the associated power control switch 60 to block the power control signal from further processing. Otherwise, the logic of the controller 56b moves to block 82 to control the associated power control switch 60 to pass the power control signal on to the power control combiner 28 (HG. 1). While the particular METHOD AND APPARATUS FOR

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/US1998/017528 1997-08-29 1998-08-24 Method and apparatus for processing power control signals in a mobile telephone system Ceased WO1999010985A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP98943361A EP1010258B1 (en) 1997-08-29 1998-08-24 Method and apparatus for processing power control signals in a mobile telephone system
AU91180/98A AU9118098A (en) 1997-08-29 1998-08-24 Method and apparatus for processing power control signals in a mobile telephone system
KR1020007002145A KR100683356B1 (ko) 1997-08-29 1998-08-24 이동 전화시스템에서 전력 제어 신호를 처리하기 위한방법 및 장치
HK00107897.9A HK1029677B (en) 1997-08-29 1998-08-24 Method and apparatus for processing power control signals in a mobile telephone system
DE69836031T DE69836031T2 (de) 1997-08-29 1998-08-24 Verfahren und Vorrichtung zur Verarbeitung von Leistungssteuerungsignalen in einem Mobilfunksystem
JP2000556554A JP4278304B2 (ja) 1997-08-29 1998-08-24 移動電話システム内の出力制御信号の処理方法と処理装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/919,806 US6097972A (en) 1997-08-29 1997-08-29 Method and apparatus for processing power control signals in CDMA mobile telephone system
US08/919,806 1997-08-29

Publications (2)

Publication Number Publication Date
WO1999010985A2 true WO1999010985A2 (en) 1999-03-04
WO1999010985A3 WO1999010985A3 (en) 1999-05-27

Family

ID=25442692

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/017528 Ceased WO1999010985A2 (en) 1997-08-29 1998-08-24 Method and apparatus for processing power control signals in a mobile telephone system

Country Status (9)

Country Link
US (1) US6097972A (enExample)
EP (1) EP1010258B1 (enExample)
JP (1) JP4278304B2 (enExample)
KR (1) KR100683356B1 (enExample)
CN (1) CN1124698C (enExample)
AU (1) AU9118098A (enExample)
DE (1) DE69836031T2 (enExample)
WO (1) WO1999010985A2 (enExample)
ZA (1) ZA987691B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011800A1 (en) * 1999-08-06 2001-02-15 Qualcomm Incorporated Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system
US6627246B2 (en) 2000-05-16 2003-09-30 Ortho-Mcneil Pharmaceutical, Inc. Process for coating stents and other medical devices using super-critical carbon dioxide

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7936728B2 (en) 1997-12-17 2011-05-03 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
US9525923B2 (en) 1997-12-17 2016-12-20 Intel Corporation Multi-detection of heartbeat to reduce error probability
US8175120B2 (en) 2000-02-07 2012-05-08 Ipr Licensing, Inc. Minimal maintenance link to support synchronization
US7079523B2 (en) * 2000-02-07 2006-07-18 Ipr Licensing, Inc. Maintenance link using active/standby request channels
US7394791B2 (en) 1997-12-17 2008-07-01 Interdigital Technology Corporation Multi-detection of heartbeat to reduce error probability
US6222832B1 (en) 1998-06-01 2001-04-24 Tantivy Communications, Inc. Fast Acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
US8134980B2 (en) 1998-06-01 2012-03-13 Ipr Licensing, Inc. Transmittal of heartbeat signal at a lower level than heartbeat request
US7773566B2 (en) 1998-06-01 2010-08-10 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
KR20000002254A (ko) * 1998-06-18 2000-01-15 윤종용 이동통신시스템의 송수신 장치 및 방법
US6438116B1 (en) * 1998-07-16 2002-08-20 Telefonaktiebolaget L M Ericsson (Publ) Adaptive power margin for hard handoffs in code division multiple access based systems
US6658050B1 (en) * 1998-09-11 2003-12-02 Ericsson Inc. Channel estimates in a CDMA system using power control bits
JP3321419B2 (ja) * 1998-09-17 2002-09-03 松下電器産業株式会社 通信端末装置および無線通信方法
US6665282B1 (en) * 1998-12-04 2003-12-16 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for configuring a RAKE receiver
US6269239B1 (en) * 1998-12-11 2001-07-31 Nortel Networks Corporation System and method to combine power control commands during soft handoff in DS/CDMA cellular systems
US6229841B1 (en) * 1998-12-11 2001-05-08 Qualcomm Incorporated Method and apparatus for energy estimation in a wireless receiver capable of receiving multiple instances of a common signal
US6717976B1 (en) * 1998-12-21 2004-04-06 Nortel Networks Ltd. Method and apparatus for signal to noise power ratio estimation in a multi sub-channel CDMA receiver
US6618431B1 (en) * 1998-12-31 2003-09-09 Texas Instruments Incorporated Processor-based method for the acquisition and despreading of spread-spectrum/CDMA signals
US6621808B1 (en) * 1999-08-13 2003-09-16 International Business Machines Corporation Adaptive power control based on a rake receiver configuration in wideband CDMA cellular systems (WCDMA) and methods of operation
US6996069B2 (en) 2000-02-22 2006-02-07 Qualcomm, Incorporated Method and apparatus for controlling transmit power of multiple channels in a CDMA communication system
KR100773794B1 (ko) 2000-02-23 2007-11-07 아이피알 라이센싱, 인코포레이티드 충돌 검출 기능을 갖는 액세스 프로브 응답
JP3414357B2 (ja) * 2000-04-25 2003-06-09 日本電気株式会社 Ｃｄｍａ移動通信システムにおける送信電力制御方式
US6917609B2 (en) * 2000-08-21 2005-07-12 Pctel Maryland, Inc. Method and apparatus for CDMA pn scanning at indoor and other obstructed locations
US8155096B1 (en) 2000-12-01 2012-04-10 Ipr Licensing Inc. Antenna control system and method
US7085310B2 (en) 2001-01-29 2006-08-01 Qualcomm, Incorporated Method and apparatus for managing finger resources in a communication system
US7551663B1 (en) 2001-02-01 2009-06-23 Ipr Licensing, Inc. Use of correlation combination to achieve channel detection
US6954448B2 (en) 2001-02-01 2005-10-11 Ipr Licensing, Inc. Alternate channel for carrying selected message types
US7068707B2 (en) * 2001-03-08 2006-06-27 Qualcomm, Inc. Method and apparatus for tracking signals in a wireless communication system
US6771706B2 (en) * 2001-03-23 2004-08-03 Qualcomm Incorporated Method and apparatus for utilizing channel state information in a wireless communication system
US6785341B2 (en) 2001-05-11 2004-08-31 Qualcomm Incorporated Method and apparatus for processing data in a multiple-input multiple-output (MIMO) communication system utilizing channel state information
US6662024B2 (en) 2001-05-16 2003-12-09 Qualcomm Incorporated Method and apparatus for allocating downlink resources in a multiple-input multiple-output (MIMO) communication system
US7047016B2 (en) * 2001-05-16 2006-05-16 Qualcomm, Incorporated Method and apparatus for allocating uplink resources in a multiple-input multiple-output (MIMO) communication system
US7072413B2 (en) * 2001-05-17 2006-07-04 Qualcomm, Incorporated Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion
US6751187B2 (en) 2001-05-17 2004-06-15 Qualcomm Incorporated Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel transmission
US7688899B2 (en) 2001-05-17 2010-03-30 Qualcomm Incorporated Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion
CA2867406C (en) 2001-06-13 2016-08-02 Intel Corporation Transmittal of heartbeat signal at a lower level than heartbeat request
US6526031B1 (en) * 2001-06-21 2003-02-25 Motorola, Inc. Forward power control determination in spread spectrum communications systems
US7027523B2 (en) 2001-06-22 2006-04-11 Qualcomm Incorporated Method and apparatus for transmitting data in a time division duplexed (TDD) communication system
US7230975B2 (en) * 2001-08-07 2007-06-12 Qualcomm Incorporated Adaptive pilot filter for a wireless communication system
US6983166B2 (en) * 2001-08-20 2006-01-03 Qualcomm, Incorporated Power control for a channel with multiple formats in a communication system
US20030081538A1 (en) * 2001-10-18 2003-05-01 Walton Jay R. Multiple-access hybrid OFDM-CDMA system
US7164649B2 (en) * 2001-11-02 2007-01-16 Qualcomm, Incorporated Adaptive rate control for OFDM communication system
US20030125040A1 (en) * 2001-11-06 2003-07-03 Walton Jay R. Multiple-access multiple-input multiple-output (MIMO) communication system
US6754254B2 (en) * 2001-11-09 2004-06-22 Qualcomm Incorporated Control of transit power during out-of-lock condition
US7082107B1 (en) 2001-11-26 2006-07-25 Intel Corporation Power control in wireless communications based on estimations of packet error rate
US7020110B2 (en) * 2002-01-08 2006-03-28 Qualcomm Incorporated Resource allocation for MIMO-OFDM communication systems
US7272118B1 (en) 2002-02-06 2007-09-18 Sprint Spectrum L.P. Method and system for selecting vocoder rates and transmit powers for air interface communications
US7493132B2 (en) * 2003-02-14 2009-02-17 Qualcomm Incorporated System and method for uplink rate selection
US7016698B2 (en) * 2003-06-26 2006-03-21 Motorola, Inc. Method and apparatus for mitigating power-control errors during a soft handoff in a wireless communication system
JP2006186757A (ja) * 2004-12-28 2006-07-13 Nec Corp 無線通信システムにおける送信電力制御方法およびその装置。
US8140107B1 (en) 2008-01-04 2012-03-20 Sprint Spectrum L.P. Method and system for selective power control of wireless coverage areas
CN115834322B (zh) * 2022-11-11 2024-04-12 西南交通大学 一种基于分离接收机和智能反射面辅助的通信系统

Family Cites Families (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310631A (en) * 1963-06-03 1967-03-21 Itt Communication system for the selective transmission of speech and data
DE2048056C1 (de) * 1970-09-30 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen Empfänger für in SSMA-Technik modulierte elektrische Schwingungen
US3714508A (en) * 1971-02-22 1973-01-30 Gen Electric Sequential flashing of multiple flash lamps by low cost static control circuit of integrated design
US4052565A (en) * 1975-05-28 1977-10-04 Martin Marietta Corporation Walsh function signal scrambler
US4112257A (en) * 1977-03-24 1978-09-05 Frost Edward G Comprehensive automatic mobile radio telephone system
US4225976A (en) * 1978-02-28 1980-09-30 Harris Corporation Pre-calibration of gain control circuit in spread-spectrum demodulator
US4222115A (en) * 1978-03-13 1980-09-09 Purdue Research Foundation Spread spectrum apparatus for cellular mobile communication systems
GB2022365A (en) * 1978-06-02 1979-12-12 Texas Instruments Inc Communications network for data and voice
US4291409A (en) * 1978-06-20 1981-09-22 The Mitre Corporation Spread spectrum communications method and apparatus
US4301530A (en) * 1978-12-18 1981-11-17 The United States Of America As Represented By The Secretary Of The Army Orthogonal spread spectrum time division multiple accessing mobile subscriber access system
US4730340A (en) * 1980-10-31 1988-03-08 Harris Corp. Programmable time invariant coherent spread symbol correlator
US4472815A (en) * 1982-09-27 1984-09-18 The United States Of America As Represented By The Secretary Of The Army Pulse interference cancelling system for spread spectrum signals
US4460992A (en) * 1982-11-04 1984-07-17 The United States Of America As Represented By The Secretary Of The Army Orthogonal CDMA system utilizing direct sequence pseudo noise codes
GB2132452B (en) * 1982-12-08 1986-10-08 Racel Ses Limited Radio systems
US4495648A (en) * 1982-12-27 1985-01-22 At&T Bell Laboratories Transmitter power control circuit
US4641322A (en) * 1983-10-18 1987-02-03 Nec Corporation System for carrying out spread spectrum communication through an electric power line
US4688035A (en) * 1983-11-28 1987-08-18 International Business Machines Corp. End user data stream syntax
US4635221A (en) * 1985-01-18 1987-01-06 Allied Corporation Frequency multiplexed convolver communication system
US4672658A (en) * 1985-10-16 1987-06-09 At&T Company And At&T Bell Laboratories Spread spectrum wireless PBX
US4700341A (en) * 1985-10-30 1987-10-13 Racal Data Communications Inc. Stochastic time division multiplexing
DE3607687A1 (de) * 1986-03-08 1987-09-10 Philips Patentverwaltung Verfahren und schaltungsanordnung zum weiterschalten einer funkverbindung in eine andere funkzelle eines digitalen funkuebertragungssystems
DE3689979T2 (de) * 1986-03-25 1995-01-26 Motorola Inc Verfahren und einrichtung zur steuerung eines zeitmultiplex-kommunikationsgerätes.
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US4813040A (en) * 1986-10-31 1989-03-14 Futato Steven P Method and apparatus for transmitting digital data and real-time digitalized voice information over a communications channel
NL8700930A (nl) * 1987-04-17 1988-11-16 Hollandse Signaalapparaten Bv Systeem van orthogonaal werkende codegeneratoren, radio's voorzien van een codegenerator en codegeneratoren van zo'n systeem.
DE3724729A1 (de) * 1987-07-25 1989-02-02 Ant Nachrichtentech Verfahren zur aufbereitung eines faltungscodes zur uebertragung sowie dessen empfangsseitige rueckwandlung sowie anordnung hierzu
FR2629931B1 (fr) * 1988-04-08 1991-01-25 Lmt Radio Professionelle Correlateur numerique asynchrone et demodulateurs comportant un tel correlateur
JPH0234059A (ja) * 1988-07-25 1990-02-05 Mitsubishi Electric Corp ノード装置の処理方式
JPH06103873B2 (ja) * 1988-09-01 1994-12-14 三菱電機株式会社 直交系列発生方式
JP2603717B2 (ja) * 1989-03-09 1997-04-23 三菱電機株式会社 サイクリックデータ伝送方法
US5157672A (en) * 1989-03-15 1992-10-20 Nec Corporation Interference detection apparatus for use in digital mobile communications system
US5022046A (en) * 1989-04-14 1991-06-04 The United States Of America As Represented By The Secretary Of The Air Force Narrowband/wideband packet data communication system
JP2995065B2 (ja) * 1989-07-03 1999-12-27 日本電信電話株式会社 移動通信方式における送信電力制御方法
GB2236454A (en) * 1989-09-01 1991-04-03 Philips Electronic Associated Communications system for radio telephones
JP2733110B2 (ja) * 1989-09-19 1998-03-30 日本電信電話株式会社 無線信号伝送方式
IL95920A0 (en) * 1989-10-24 1991-07-18 Motorola Inc Distributed synchronization method for a wireless fast packet communication system
US5267262A (en) * 1989-11-07 1993-11-30 Qualcomm Incorporated Transmitter power control system
US5485486A (en) * 1989-11-07 1996-01-16 Qualcomm Incorporated Method and apparatus for controlling transmission power in a CDMA cellular mobile telephone system
US5101501A (en) * 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5056109A (en) * 1989-11-07 1991-10-08 Qualcomm, Inc. Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
US5136586A (en) * 1989-12-04 1992-08-04 Academy Of Applied Science Method and apparatus for telephone line multiplex channeling of toll-quality voice and digital information
JP2540968B2 (ja) * 1990-02-27 1996-10-09 日本電気株式会社 多方向多重通信方式
JP3035625B2 (ja) 1990-05-29 2000-04-24 株式会社リコー 現像剤担持体
US5511073A (en) * 1990-06-25 1996-04-23 Qualcomm Incorporated Method and apparatus for the formatting of data for transmission
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
SE467386B (sv) * 1990-10-05 1992-07-06 Ericsson Telefon Ab L M Foerfarande foer reglering av uteffekt i mobilradiosystem
US5283780A (en) * 1990-10-18 1994-02-01 Stanford Telecommunications, Inc. Digital audio broadcasting system
FR2670973B1 (fr) * 1990-12-19 1994-04-15 Ouest Standard Telematique Sa Systeme de transmission par paquets a compression de donnees, procede et equipement correspondant.
US5204876A (en) * 1991-03-13 1993-04-20 Motorola, Inc. Method and apparatus for providing high data rate traffic channels in a spread spectrum communication system
DE69233397T2 (de) * 1991-06-11 2005-08-11 Qualcomm, Inc., San Diego Vorrichtung und Methode zur Maskierung von Fehlern in Datenrahmen
US5220678A (en) * 1991-08-12 1993-06-15 Motorola, Inc. Method and apparatus for adjusting the power of a transmitter
US5159608A (en) * 1991-08-28 1992-10-27 Falconer David D Method and apparatus for using orthogonal coding in a communication system
US5245629A (en) * 1991-10-28 1993-09-14 Motorola, Inc. Method for compensating for capacity overload in a spread spectrum communication system
US5267261A (en) * 1992-03-05 1993-11-30 Qualcomm Incorporated Mobile station assisted soft handoff in a CDMA cellular communications system
US5305468A (en) * 1992-03-18 1994-04-19 Motorola, Inc. Power control method for use in a communication system
GB2268371B (en) * 1992-04-10 1995-09-20 Roke Manor Research Radio communication systems
US5465399A (en) * 1992-08-19 1995-11-07 The Boeing Company Apparatus and method for controlling transmitted power in a radio network
NZ255617A (en) * 1992-09-04 1996-11-26 Ericsson Telefon Ab L M Tdma digital radio: measuring path loss and setting transmission power accordingly
US5263050A (en) * 1992-09-09 1993-11-16 Echelon Corporation Adaptive threshold in a spread spectrum communications system
GB2273009A (en) * 1992-11-28 1994-06-01 Motorola Gmbh RF Power amplifier ramp control of power level rise and fall
US5299229A (en) * 1993-01-29 1994-03-29 Unisys Corporation High rate-low rate PN code tracking system
US5396516A (en) * 1993-02-22 1995-03-07 Qualcomm Incorporated Method and system for the dynamic modification of control paremeters in a transmitter power control system
US5341396A (en) * 1993-03-02 1994-08-23 The Boeing Company Multi-rate spread system
FI110043B (fi) * 1993-09-20 2002-11-15 Nokia Corp Menetelmä kanavanvaihdon suorittamiseksi CDMA-solukkoradiojärjestelmässä sekä liikkuva asema
JP3192839B2 (ja) * 1993-09-20 2001-07-30 富士通株式会社 初期送信電力の決定方法
US5383219A (en) * 1993-11-22 1995-01-17 Qualcomm Incorporated Fast forward link power control in a code division multiple access system
GB2287379B (en) * 1994-03-10 1998-06-10 Roke Manor Research Apparatus for use in a mobile radio system
JP2904335B2 (ja) * 1994-04-27 1999-06-14 エヌ・ティ・ティ移動通信網株式会社 送信電力制御方法および移動局装置
US5671218A (en) * 1994-04-28 1997-09-23 Lucent Technologies Inc. Controlling power and access of wireless devices to base stations which use code division multiple access
US5548616A (en) * 1994-09-09 1996-08-20 Nokia Mobile Phones Ltd. Spread spectrum radiotelephone having adaptive transmitter gain control
US5528593A (en) * 1994-09-30 1996-06-18 Qualcomm Incorporated Method and apparatus for controlling power in a variable rate communication system
US5602833A (en) * 1994-12-19 1997-02-11 Qualcomm Incorporated Method and apparatus for using Walsh shift keying in a spread spectrum communication system
JP2877023B2 (ja) * 1995-01-17 1999-03-31 日本電気株式会社 論理回路分割方法
US5764687A (en) * 1995-06-20 1998-06-09 Qualcomm Incorporated Mobile demodulator architecture for a spread spectrum multiple access communication system
US5629934A (en) * 1995-06-30 1997-05-13 Motorola, Inc. Power control for CDMA communication systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011800A1 (en) * 1999-08-06 2001-02-15 Qualcomm Incorporated Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system
JP2003506958A (ja) * 1999-08-06 2003-02-18 クゥアルコム・インコーポレイテッド 無線パケットデータ通信システムにおける閉ループパワー制御設定点を決定する方法および装置
US6633552B1 (en) 1999-08-06 2003-10-14 Qualcomm Incorporated Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system
US7088957B2 (en) 1999-08-06 2006-08-08 Qualcomm Incorporated. Method and apparatus for determining the closed loop power control set point in a wireless packet data communication system
KR100725429B1 (ko) * 1999-08-06 2007-06-07 퀄컴 인코포레이티드 무선 패킷 데이터 통신시스템에서 폐루프 전력 제어 설정값을 결정하는 방법 및 장치
US6627246B2 (en) 2000-05-16 2003-09-30 Ortho-Mcneil Pharmaceutical, Inc. Process for coating stents and other medical devices using super-critical carbon dioxide

Also Published As

Publication number Publication date
EP1010258A2 (en) 2000-06-21
WO1999010985A3 (en) 1999-05-27
EP1010258B1 (en) 2006-09-27
JP2002519906A (ja) 2002-07-02
KR100683356B1 (ko) 2007-02-15
KR20010023499A (ko) 2001-03-26
ZA987691B (en) 1999-07-02
CN1124698C (zh) 2003-10-15
AU9118098A (en) 1999-03-16
DE69836031D1 (de) 2006-11-09
DE69836031T2 (de) 2007-04-05
HK1029677A1 (en) 2001-04-06
JP4278304B2 (ja) 2009-06-10
CN1272983A (zh) 2000-11-08
US6097972A (en) 2000-08-01

Similar Documents

Publication Publication Date Title
EP1010258B1 (en) Method and apparatus for processing power control signals in a mobile telephone system
US6628631B1 (en) Radio communication system and handoff method therefor
KR100322949B1 (ko) 소프트핸드오프동안베이스스테이션으로부터평균다운링크전송전력을감소시키기위한방법및장치
KR100318117B1 (ko) 공통기지국섹터사이에서핸드오프를수행하기위한방법및장치
KR100615865B1 (ko) 전력 제어 명령이 에러상태일 가능성에 기초하여 역 링크전력제어 신호들을 전송하는 방법 및 장치
KR100274711B1 (ko) 송신전력제어방법및장치
US6408039B1 (en) Radio communication apparatus employing a rake receiver
US5987326A (en) Transmit power reduction for a high speed CDMA link in soft handoff
US6477157B1 (en) Dedicated control channel handoff in CDMA communication system
KR100276698B1 (ko) 코드분할다중접속셀룰러이동통신시스템에서소프트핸드오프시의순방향링크전력제어방법및장치
EP1182902B1 (en) Method and base station for locating reverse link interference from other cells and triggering handoff for a wireless network
EP0872052B1 (en) Method and apparatus for performing handoff in a spread-spectrum communication system
EP1366577B1 (en) Method and apparatus for tracking signals in a wireless communication system
WO2000056102A1 (en) A cdma cellular communication system and method of access therefor
JPH1169416A (ja) セルラ通信システム、及びそれに用いられる移動機と基地局
CA2210648C (en) Cdma system mobile communication receiver
US7149190B1 (en) MAC channel operation employable for receiving on more than one forward link channel
EP1197098B1 (en) Method and apparatus for fast handoff in a communication system
HK1029677B (en) Method and apparatus for processing power control signals in a mobile telephone system
HK1030112A (en) Method and apparatus for processing power control signals in a mobile telephone system

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 98808668.9

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE GH GM HR HU ID IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 1998943361

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2000 556554

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1020007002145

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 1998943361

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

WWP Wipo information: published in national office

Ref document number: 1020007002145

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1998943361

Country of ref document: EP

WWG Wipo information: grant in national office

Ref document number: 1020007002145

Country of ref document: KR