WO2001037443A1 - Power controlling apparatus and method in mobile communication system - Google Patents
Power controlling apparatus and method in mobile communication system Download PDFInfo
- Publication number
- WO2001037443A1 WO2001037443A1 PCT/KR2000/001311 KR0001311W WO0137443A1 WO 2001037443 A1 WO2001037443 A1 WO 2001037443A1 KR 0001311 W KR0001311 W KR 0001311W WO 0137443 A1 WO0137443 A1 WO 0137443A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- frame
- information
- state indicating
- reception state
- bits
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
Definitions
- the present invention relates generally to a mobile commumcation system, and in particular, to an apparatus and method for reporting the result of frame reception in a CDMA (Code Division Multiple Access) mobile communication system.
- CDMA Code Division Multiple Access
- Reporting the result of frame reception is a process where a receiver determines the reception state of a frame and transmits the determined state to a transmitter.
- the reception state may represent a CRC check result, the energy level of the received frame, or a different kind of reception quality.
- the transmitter Based on the frame reception result, the transmitter performs power control for the receiver.
- a receiver in a conventional mobile communication system reports the reception result of a frame on one channel only to a transmitter. Therefore, when frames are received on two or more channels simultaneously, a report is made on only one of the channels.
- the conventional reporting of a frame reception result will be described in more detail in conjunction with a CDMA mobile communication system standardized in TIA TR45.5/3GPP2 (referred to as a CDMA 2000 system). It is assumed that the transmitter is in a base station and the receiver in a mobile station.
- the CDMA 2000 system uses a fundamental channel (FCH), a dedicated control channel (DCCH), a supplemental channel (SCH), and a supplemental code channel (SCCH) as traffic channels.
- FCH fundamental channel
- DCCH dedicated control channel
- SCH supplemental channel
- SCCH Supplemental code channel
- Two cases may be considered in describing the reporting of a frame reception result: using one traffic channel as shown in FIG. 1A and using at least two traffic channels as shown in FIG. IB.
- a base station transmitter 110a transmits a frame on one of the traffic channels to a mobile station receiver 120a and the mobile station receiver 120a reports the reception result of the frame back to the base station 110a.
- frame reception and reporting of the reception result occur only on one channel, thereby avoiding the problem of excluding other traffic channels from reporting reception results. It is clear, however, that such an operation cannot provide services on a plurality of traffic channels.
- a transmitter 110b transmits frames on at least two traffic channels, that is, a first traffic channel frame and a second traffic channel frame to a receiver 120b and the receiver 120b reports a reception result back to the transmitter 110b.
- the first traffic channel can be the FCH or the DCCH and the second traffic channel can be the SCH or the SCCH.
- FIG. 2 illustrates the temporal relationship between a frame received on a traffic channel and a transmit frame having the reception result of the received frame in the conventional technology.
- the receiver receives an (i+l) th frame on the traffic channel, it transmits the reception result of the (i+l) th frame in an (i+3) 1 frame after two frames.
- the two frame-delay happens because frames are transmitted and received in synchronization at the mobile station and thus the reception result of the (i+1) receive frame cannot be transmitted in an (i+1) 1 transmit frame.
- the time required to process the (i+l) th received frame makes it impossible to transmit the reception result of the (i+l) th received frame in an (i+2) th transmit frame.
- one frame is 20ms in duration.
- FIG. 3A illustrates a multiplexer (MUX) for multiplexing frame reception result indicator bits and a multiplexing method in the receiver operated as in FIGs. 1A and IB.
- a pilot and a power control bit are multiplexed in time to a reverse pilot channel in the CDMA 2000 system.
- FIG. 3B illustrates the structure of a power control group (PCG).
- PCG power control group
- One 20-ms frame includes 16 PCGs, each PCG having a pilot and a PCB.
- the PCB can be replaced by a reception result indicator bit.
- Each PCB has a unique value in a corresponding PCG, enabling a fast power control at a rate of up to 800Hz, the reception result indicator bit has a fixed value in one frame.
- a control bit occurs 16 times in one 20-ms frame because one 20-ms frame includes 16 1.25- ms PCGs, each PCG having a unique control bit.
- One 1.25-ms PCG is divided into four 0.3125-ms groups, each having 384N chips. The last of the four groups is reserved for the control bit.
- a spreading rate of 1.2288Mcps be 1.
- 384 means the number of chips in one group and N is a spreading rate. For example, if a spreading rate is 3, that is, 3.6864Mcps, 384x3 chips are assigned to each group by
- 16 power control bits in one frame are set to represent one reception result value.
- the reception result of a frame on one traffic channel is set in 16 PCBs.
- FIG. 4A illustrates the structure of a frame containing a reception result reported by the conventional mobile station.
- all frame reception result indicator bits in one frame are set to an identical value, that is, they represent the reception result of one received frame.
- the base station 110b transmits the first and second traffic channels to the mobile station 120b but the mobile station 120b reports the reception result of only one channel, i.e., the first traffic channel in the frame shown in FIG. 4.
- the reception result may be used for the base station to control the transmission power of the mobile station. If the reception result has been reported as good, the base station instructs the mobile station to gradually reduce its transmission power and vice versa, so that the mobile station can receive a signal at an acceptable quality level. This is a slow power control on a frame basis that may be implemented only if a fast power control is not feasible.
- the fast power control occurs 16 times per frame.
- the first traffic channel may differ from the second traffic channel in data rate, code rate, and QoS (Quality of Service) requirements. This implies that it is necessary to implement power control on the traffic channels separately because of the difference in characteristics between the traffic channels.
- QoS Quality of Service
- a fast power control using PCBs may be used for power control of two traffic channels. That is, the mobile station transmitter transmits the PCBs for the fast power control on each of the two traffic channels.
- fast power control is not reliably done if an SCH is transmitted in a DTX (Discontinuous Transmission) mode or at a variable rate. In the DTX mode, an outer loop set point is not maintained appropriately, and at a variable rate, the requirement of rate detection before PCB •transmission is not satisfied.
- a receiver in a mobile station multiplexes the frame reception result indicator bits for at least two traffic channels received from a transmitter in a base station, inserts the multiplexed frame reception result indicator bits in a pilot signal bit by bit, and transmits the reverse frame. Then, the base station extracts the pilot signal from the reverse frame, demultiplexes the frame reception result indicator bits, and performs a power control on the traffic channels based on the values of the frame reception result indicator bits.
- FIG. 1A illustrates a conventional operation of reporting a frame reception result in a mobile communication system
- FIG. IB illustrates another conventional operation of reporting a frame reception result in the mobile communication system
- FIG. 1C illustrates an operation of reporting frame reception results in a mobile communication system according to an embodiment of the present invention
- FIG. 2 illustrates a frame delay generally involved in reporting a frame reception result in the conventional mobile communication system
- FIG. 3 A illustrates multiplexing of frame reception result indicator bits in a conventional receiver
- FIG. 3B illustrates the structure of a conventional PCG
- FIG. 4A illustrates the structure of a frame used for the conventional reception result reporting
- FIG. 4B illustrates an embodiment of a frame structure for reception result reporting according to the present invention
- FIG. 4C illustrates another embodiment of the frame structure for reception result reporting according to the present invention
- FIG. 4D illustrates a third embodiment of the frame structure for reception result reporting according to the present invention
- FIG. 4E illustrates a fourth embodiment of the frame structure for reception result reporting according to the present invention
- FIG. 4F illustrates a fifth embodiment of the frame structure for reception result reporting according to the present invention
- FIG. 5 is a block diagram illustrating a base station transmitter in the mobile communication system according to the present invention.
- FIG. 6A is a partial block diagram illustrating a mobile station receiver in conjunction with reception of a first traffic channel frame in the mobile communication system according to the present invention
- FIG. 6B is a partial block diagram illustrating a mobile station receiver in conjunction with reception of a " second traffic channel frame in the mobile communication system according to the present invention
- FIG. 7A is a partial block diagram illustrating an embodiment of the mobile station transmitter in conjunction with generation of a reverse transmit frame in the mobile commumcation system according to the present invention
- FIG. 7B is a partial block diagram illustrating an embodiment of the base station receiver in conjunction with processing the reverse frame received from the receiver shown in FIG. 7A in the mobile commumcation system according to the present invention
- FIG. 8A is a partial block diagram illustrating another embodiment of the mobile station transmitter in conjunction with generation of a reverse transmit frame in the mobile commumcation system according to the present invention
- FIG. 8B illustrates the structure of the reverse transmit frame generated in the receiver shown in FIG. 8A;
- FIG. 8C is a partial block diagram illustrating another embodiment of the base station receiver in conjunction with processing the reverse frame received from the receiver shown in FIG. 8A in the mobile communication system according to the present invention
- FIG. 9A is a partial block diagram illustrating a third embodiment of the mobile station transmitter in conjunction with generation of a reverse transmit frame in the mobile communication system according to the present invention.
- FIG. 9B illustrates the structure illustrating the reverse transmit frame generated in the receiver shown in FIG. 9A
- FIG. 9C is a partial block diagram illustrating a third embodiment of the base station receiver in conjunction with processing the reverse frame received from the receiver shown in FIG. 8A in the mobile communication system according to the present invention
- FIG. 10A is a partial block diagram illustrating a fourth embodiment of the mobile station transmitter in conjunction with generation of a reverse transmit frame in the mobile commumcation system according to the present invention.
- FIG. 10B is a partial block diagram illustrating a fourth embodiment of the base station receiver in conjunction with processing the reverse frame received from the receiver shown in FIG. 10A in the mobile communication system according to the present invention.
- FIG. 1C illustrates generally how a mobile station reports reception results according the present invention.
- a transmitter (base station) 110c transmits a first traffic channel frame and a second traffic channel frame to a receiver (mobile station) 120c.
- the mobile station 120c multiplexes the reception results of the first and second traffic channel frames prior to transmission.
- the base station 110c can perform a slow power control or a fast power control according to the reception results. This operation also applies to other cases with more than two traffic channels.
- FIG. 4B illustrates an embodiment of a frame structure for reception result reporting according to the present invention.
- a base station transmits a first traffic channel frame and a second traffic channel frame
- a mobile station multiplexes a reverse pilot signal and frame reception result indicator bits in time prior to transmission as in the conventional method.
- the present invention differs since 16 frame reception result indicator bits form a value for one channel reception result in one frame in the conventional method, whereas the first 8 control bits are set as frame reception result indicator bits to indicate the reception result of the first traffic channel frame and the last 8 control bits are set as frame reception result indicator bits to indicate the reception result of the second traffic channel frame in the present invention. While the same number of bits are assigned as each traffic channel frame reception result indicator bits, each traffic channel reception result can be represented with a different number of frame reception result indicator bits (e.g., 10:6).
- FIG. 4C illustrates another embodiment of the frame structure for reception result reporting according to the present invention.
- control bits in a reverse frame are assigned alternately as a reception result indicator bit for the first traffic channel frame and a reception result indicator bit for the second traffic channel frame.
- the odd-numbered control bits are set as the frame reception result indicator bits for the first traffic channel frame and the even- numbered control bits are set as the frame reception result indicator bits for the second traffic channel frame.
- FIG. 4D illustrates a third embodiment of the frame structure for reception result reporting according to the present invention.
- the reception results of the traffic channel frames are encoded to a codeword with length 16.
- Diverse codes representing the reception results may be contemplated.
- the codewords since the codewords are defined to report the states of the first and second traffic channels, they must be mutually orthogonal.
- Table 1 illustrates an example orthogonal codeword set indicating the states of the first and second traffic channels.
- the codeword “0000000000000000” represents that the reception results of both the traffic channels are good.
- the codeword “01010101010101” represents that the reception result of the first traffic channel is good but that of the second traffic channel is bad.
- reception results are simply classified as "good” or “bad” in Table 1, more information, for example, CRC check results and received energy level can be incorporated in the reception results.
- the base station Upon receipt of a frame encoded in the manner as described above, the base station multiplies a 16-bit codeword in the frame by each of the four orthogonal codes shown in Table 1 and selects a reception result corresponding to an orthogonal code with the highest correlation value. For example, if the 16-bit codeword has the highest correlation to the orthogonal code "0000000000000000", the base station concludes that the mobile station received the first and second traffic channel with good reception quality.
- FIG. 4E illustrates a fourth embodiment of a frame structure for reception result reporting according to the present invention.
- the fourth embodiment is the same as the above three embodiments in so much as the base station transmits a first traffic channel frame and a second traffic channel frame and the mobile station multiplexes a reverse pilot signal and first and second traffic control bits in time prior to transmission, except that, in this case the power control bits are inserted in the positions of the first traffic control bits instead of the frame reception result indicator bits. That is, the power control bits each having a separate value are transmitted for the first traffic channel, while frame reception result indicator bits are transmitted for the second traffic channel, having one value in one frame.
- the base station transmitter 110c is capable of performing a fast power control at 400Hz for the first traffic channel and a slow power control at 50Hz for the second traffic channel.
- the power control bits are the same in number as the frame reception result indicator bits and they alternate in the frame in FIG. 4E, but obviously, they may differ in number with a different pattern. Furthermore, this embodiment applies to other cases with more than two traffic channels.
- FIG. 4F illustrates a fifth embodiment of the frame structure for reception result reporting according to the present invention.
- the power control bits and the frame reception result indicator bits are assigned 1 :3 in number in a reverse frame.
- FIG. 5 is a block diagram of a base station transmitter according to the present invention.
- a first traffic channel frame generator 510 generates a first traffic channel frame.
- a multiplier 514 multiplies the first traffic channel frame by a first channel gain.
- a second traffic channel frame generator 512 generates a second traffic channel frame.
- a multiplier 516 multiplies the first traffic channel frame by a second channel gain.
- a channel gain controller 522 transmits a control signal for controlling the gains of the traffic frames based on frame reception results received from a receiver.
- a first gain generator 518 generates the first channel gain under the control of the channel gain controller 522, and a second gain generator 520 generates the second channel gain under the control of the controller 522.
- a multiplier 524 multiplies the output of the multiplier 514 by a first orthogonal code and a multiplier 526 multiplies the output of the multiplier 516 by a second orthogonal code.
- Multipliers 528 and 530 spread the outputs of the multipliers 524 and 526, respectively, with a predetermined PN code.
- An adder 532 adds up the outputs of the multipliers 528 and 530 and transmits the sum signal. The same result can be achieved if the outputs of the multipliers 524 and 526 are added and then spread with the same PN code.
- the first and second traffic channels frame generators 510 and 512 generate the first and second traffic channel frames, respectively.
- the multiplier 514 multiplies the first traffic channel frame by the first channel gain generated from the first channel gain generator 518.
- the multiplier 516 multiplies the second traffic channel frame by the second channel gain generated from the second channel gain generator 520.
- the first and second channel gains are determined by the channel gain controller 522 based on the reception results received from the receiver.
- the multiplier 524 multiplies the gain-controlled first traffic channel frame by the first orthogonal code and the multiplier 526 multiplies the gain-controlled second traffic channel frame by the second orthogonal code.
- the multipliers 528 and 530 spread the outputs of the multipliers 524 and 526 with the predetermined PN code, respectively.
- the channel gain controller 522 controls the channel gains based on the reported reception results. To do so, an additional component is needed to extract symbols indicating the reception results of the traffic channels from a frame received from the receiver because the receiver transmits the frame reception results in many symbols in the frame. The component is illustrated in detail in FIGs. 7C, 8C, 9C, and 10B.
- the transmission power of the first and second traffic channels are decreased slowly at the same rate.
- the transmission power of the first and second traffic channels are increased slowly at the same rate. This operation encounters no problems if the reception results of the first and second traffic channel frames are identical. In other words, if the reception result of the first traffic channel frame is similar to that of the second traffic channel frame, the transmission power of the first and second traffic channels are gradually decreased or increased at the same rate with the ratio in transmission power of the second traffic channel to the first traffic channel maintained.
- the transmission power of the first traffic channel is decreased with that of the second traffic power maintained if the reception result of the first traffic channel frame is good and that of the second traffic channel frame is bad. In this manner, the transmission power ratio is adjusted until the reception results of the traffic channel frames are both bad. Then, with the power ratio "of the traffic channels maintained constant, a power control is implemented, thereby keeping the reception quality at an acceptable level.
- the power control will be described later in more detail along with a description of the receiver.
- FIG. 6A is a partial block diagram of a mobile station receiver in conjunction with reception of a first traffic channel frame in the mobile communication system according to the present invention.
- a despreader 610 despreads the first traffic channel frame received on a forward link with a PN sequence.
- a decoder 612 despreads the PN-despread signal with an orthogonal code for the corresponding channel.
- the orthogonal code can be a Walsh code and the channel can be a user traffic channel.
- a CRC checker 614 checks the CRC of the orthogonally despread signal.
- a power measurer 616 measures the power of the PN-despread signal and determines whether the measurement is sufficient or insufficient.
- a frame reception result decider 618 decides the reception result of the first traffic channel frame based on the power measurement and outputs frame reception result indicator bits for the first traffic channel frame.
- FIG. 6B is a partial block diagram of the mobile station receiver in conjunction with reception of a second traffic channel frame in the mobile communication system according to the present invention.
- the portion for receiving the second traffic channel frame is the same in configuration as the first traffic channel frame receiving portion except that the power measurer is omitted in FIG. 6B. This is because the first traffic channel frame includes power measurement information but the second traffic channel frame does not. Since the second traffic channel frame has CRC check information only and, the second traffic channel is virtually released in terms of effects while the CRC information is not received. Accordingly, a frame reception result decider 626 decides the reception result of the second traffic channel frame based on a CRC check result received from a CRC checker 624 and outputs frame reception result indicator bits for the second traffic channel frame.
- the difference in configuration between the first traffic channel frame receiving portion shown in FIG. 6A and the second traffic channel receiving portion shown in FIG. 6B is attributed to lack of energy measurement symbols in the second traffic channel frame in comparison with the first traffic channel frame.
- CRC check and energy measuring are required to decide the reception result of the first traffic channel frame
- only CRC check is required to decide the reception result of the second traffic channel frame.
- the first and second traffic channel frames are applied to the input of the despreaders 610 and 620, respectively.
- the despreaders 610 and 620 multiply the first and second traffic channel frames by a PN code.
- the PN-despread signal of the despreader 610 is fed to the decoder 612 and the power measurer 616 and the PN-despread signal of the despreader 620, to a decoder 622.
- the decoders 612 and 622 despread the PN-despread signals with corresponding orthogonal codes.
- the CRC checkers 614 and 624 check the CRCs of the orthogonally despread signals.
- the power measurer 616 measures the power of non-PCBs and PCBs in a predetermined period of the first traffic channel frame received from the despreader 610. Specifically, the power measurer 616 determines whether the power of the first traffic channel frame is sufficient or insufficient by accumulating the power of the non-PCBs and the PCBs in the predetermined period of the first traffic channel frame and comparing the accumulated value with a reference power value.
- the frame reception result decider 618 generates a reception result indicator bit for the first traffic channel frame based on the CRC check result received from the CRC checker 614 and the decision result received from the power measurer 616 as shown in Table 2.
- the reception result indicator bit is set to "0". In the other cases, the reception result indicator bit is set to "1".
- the frame reception result decider 626 shown in FIG. 6B generates a reception result indicator bit for the second traffic channel frame based on a CRC check result received from the CRC checker 624. For example, if the CRC check result is good, the reception result indicator bit is set to "1", indicating good reception and otherwise, it is set to "0", indicating bad reception.
- reception results bits for the first and second traffic channel frames must be incorporated in one frame prior to transmission.
- Embodiments of a structure for forming a frame including the frame reception result indicator bits in the receiver are illustrated in detail in FIGs. 7A, 8A. 9A. and 10A.
- Embodiments of a device for reporting the reception results of traffic channels in one frame will first be given in connection with FIGs. 7A, 8A, 9A, and 10 A.
- FIG. 7A is a block diagram of an embodiment of a reverse transmit frame generating device in the mobile station according to the present invention.
- a first multiplexer (MUXl) 710 multiplexes the frame reception result indicator bits for the first and second traffic channel frames received from the structures shown in FIGs. 6A and 6B.
- the MUXl 710 may output the consecutive frame reception result indicator bits for the first traffic channel frame and then the frame " reception result indicator bits for the second traffic channel frame.
- the MUX 1 710 multiplexes the frame reception result indicator bits for the first and second traffic channel frames bit by bit.
- a second multiplexer (MUX2) 712 multiplexes in time a pilot signal and the multiplexed frame reception result indicator bits in such a way that one reception result indictor bit is inserted in each PCG.
- a multiplier 714 spreads the output of the MUX2 712 with a PN code agreed between the base station and the mobile station and transmits the spread signal as a reverse transmit frame.
- the MUXl
- the MUXl 710 multiplexes the frame reception result indicator bits for the first and second traffic channel frames received from the frame reception result deciders 618 and 626 shown in FIGs. 6 A and 6B.
- the multiplexing operation can be designed in a diverse way according to how the MUXl 710 is controlled. Two multiplexing ways were described above. One of them is to successively output the frame reception result indicator bits for the second traffic channel frame following the consecutive frame reception result indicator bits for the first traffic channel frame. The other is to alternately select the frame reception result indicator bits for the first and second traffic channel frames.
- a controller is required for confrol of the MUXl 710, regardless of whether the controller provides overall control to the receiver, or separately for the MUXl 710 only.
- the MUX2 712 multiplexes in time the multiplexed frame reception result indicator bits and a pilot signal so that one reception result indicator bit is inserted in each PCG. This is possible by controlling the MUX2 712 to select a reception result indicator bit at the moment when the pilot signal reaches a predetermined position. A period of inserting the frame reception result indicator bits on a bit basis and their positions may vary depending on design.
- the multiplier 714 multiplies the time-multiplexed signal received from the MUX2 712 by a predetermined PN code that identifies the transmitter (base station) and transmits the PN-spread signal as a reverse transmit frame.
- FIGs. 4B and 4C illustrates embodiments of a reverse transmit frame structure.
- the frame shown in FIG. 4B is generated when the MUXl 710 first selects a predetermined number (e.g., 8 bits) of frame reception result indicator bits for the first traffic channel frame and then the predetermined number of frame reception result indicator bits for the second traffic channel frame.
- the first eight control bits in the frame are set as the reception result bits for the first traffic channel frame, and the last eight control bits are the same as the reception result bits for the second traffic channel frame.
- the frame shown in FIG. 4C is generated when the MUXl 710 alternately selects the reception result bits for the first and second traffic channel frames.
- diverse reverse transmit frame patterns can be produced depending on how the MUXl 710 is controlled.
- FIG. 8A is a block diagram of another embodiment of the reverse transmit frame generating device in the mobile station according to the present invention.
- a MUX 810 multiplexes the frame reception result indicator bits for the first and second traffic channel frames received from the structures shown in FIGs. 6A and 6B.
- a multiplier 812 multiplies the multiplexed frame reception result indicator bits by the first orthogonal code, for modulation.
- a multiplier 814 multiplies a pilot signal by a predetermined orthogonal code (orthogonal code #0, Wo), for modulation.
- An adder 816 adds up the modulated frame reception result indicator bits and the modulated pilot signal.
- a multiplier 818 spreads the output signal of the adder 816 with a predetermined PN code and transmits the PN-spread signal as a reverse transmit frame.
- a feature of this embodiment lies in that a new code channel (the first orthogonal code) is assigned to the frame reception result indicator bits.
- the MUX 810 multiplexes the frame reception result indicator bits for the first and second traffic channel frames received from the frame reception result deciders 618 and 626 shown in FIGs. 6 A and 6B.
- the multiplexing operation can be designed in a diverse way according to how the MUX 810 is controlled, as stated above in connection with FIG. 7A.
- the multiplier 812 modulates the multiplexed frame reception result indicator bits with the first orthogonal code by multiplying them. The modulation provides channelization.
- the multiplier 814 modulates the pilot signal with the typical pilot signal orthogonal code, W 0 by multiplying them.
- the adder 816 adds up the modulated signals received- from the multipliers 812 and 814. It can be said that the multiplication and then addition of the orthogonally spread signals is code multiplexing of the frame reception result indicator bits and the pilot signal.
- the multiplier 818 multiplies the code-multiplexed signal by a PN code and transmits the PN-spread signal as a reverse transmit frame.
- the reverse transmit frame is illustrated in FIG. 8B.
- the frame reception result indicator bits are transmitted on a code channel corresponding to the first orthogonal code and the pilot signal on a code channel corresponding to W 0 in the reverse transmit frame.
- the first half of the frame reception result indicator bits are assigned for the first traffic channel frame and the last half for the second traffic channel frame.
- FIG. 9A is a block diagram of a third embodiment of the reverse transmit frame generating device in the mobile station according to the present invention.
- a MUXl 910 multiplexes in time first reverse traffic channel frame data and the frame reception result indicator bits for the first traffic channel frame received from the structure shown in FIG. 6A.
- a MUX2 912 multiplexes in time second reverse traffic channel frame data and the frame reception result indicator bits for the second traffic channel frame received from the structure shown in FIG. 6B.
- a multiplier 914 modulates the multiplexed signal received from the MUXl 910 with the first orthogonal code by multiplying them.
- a multiplier 916 modulates the multiplexed signal received from the MUX2 912 with a second orthogonal code by multiplying them.
- a multiplier 918 modulates the pilot signal with the predetermined orthogonal code (orthogonal code #0, Wo) by multiplying them.
- An adder 920 sums the output signals of the multipliers 914, 916, and 918.
- a multiplier 922 multiplies the sum by the predetermined PN code and transmits the PN-spread signal as a reverse transmit frame.
- the MUXl 910 multiplexes in time the first reverse traffic channel frame data and the frame reception result indicator bits for the first traffic channel frame received from the frame reception result decider 618 shown in FIG. 6A.
- the MUX2 912 multiplexes in time the second reverse traffic channel frame data and the frame reception result indicator bits for the second traffic channel frame received from the frame reception result decider 626 shown in FIG. 6B.
- Diverse multiplexing operations can be produced depending on methods of controlling the MUXl 910 and the MUX2 912.
- the multiplier 914 modulates the multiplexed signal received from the MUXl 910 with the first orthogonal code by multiplying them.
- the multiplier 916 modulates the multiplexed signal received from the MUX2 912 with the second orthogonal code by multiplying them.
- the multiplier 918 modulates the pilot signal with W 0 by multiplying them.
- the adder 920 sums the output signals of the multipliers 914, 916, and 918. It can be said that the multiplication and then addition of the orthogonally spread signals is code multiplexing of the frame reception result indicator bits and the pilot signal.
- the multiplier 922 multiplies the code-multiplexed signal by the predetermined PN code that identifies the base station and transmits the PN-spread signal as a reverse transmit frame.
- the reverse transmit frame is illustrated in FIG. 9B.
- the frame reception result indicator bits for the first traffic channel frame and the first reverse fraffic channel data are transmitted on the code channel corresponding to the first orthogonal code, the frame reception result indicator bits for the second traffic channel frame and the second reverse traffic channel data on the code channel corresponding to the second orthogonal code, and the pilot signal on the code channel corresponding to W 0 in the reverse transmit frame.
- FIG. 10A is a block diagram of a fourth embodiment of the reverse transmit frame generating device in the mobile station according to the present invention.
- a MUXl 1010 alternately outputs PCBs for the first traffic channel and the frame reception result indicator bits for the second traffic channel received from the structure shown in FIG. 6B.
- a MUX2 1012 multiplexes in time the multiplexed signal received from the MUX 1010 and the pilot signal so that one PCB or one frame reception result indicator bit is inserted in each PCG.
- a multiplier 1014 spreads the multiplexed signal received from the MUX2 1012 with the predetermined PN code agreed between the transmitter and the receiver and outputs the PN-spread signal as a reverse transmit frame.
- the MUXl 1010 and the MUX2 1012 can be incorporated to an equivalent 3 -way MUX in which the PCBs and frame reception result indicator bits are alternately inserted into the pilot signal.
- the MUXl 1010 multiplexes the PCBs for the first traffic channel and the frame reception result indicator bits for the second traffic channel received from the frame reception result decider shown in FIG. 6B. Diverse multiplexing operations can be produced depending on MUXl controlling methods. In this embodiment, the MUXl 1010 alternately selects the PCBs and the frame reception indicator bits.
- a controller is required for control of the MUXl 1010, regardless of whether the controller provides overall control to the receiver or separately for the MUX 1 1010 only.
- the MUX2 1012 multiplexes in time the multiplexed signal received from the MUX 1010 and the pilot signal so that one PCB or one frame reception result indicator bit is inserted in each PCG. This is possible by controlling the MUX2 1012 to select a reception result indicator bit at the moment when the pilot signal reaches a predetermined position. A period of inserting the frame reception result indicator bits on a bit basis and their positions may vary depending on designing.
- the multiplier 1014 spreads the multiplexed signal received from the MUX2 1012 with the predetermined PN code that identifies the base station and outputs the PN-spread signal as a reverse transmit frame. The reverse transmit frame is illustrated in FIG. 4E.
- the frame reverse transmit frame is produced through the multiplexing operation of alternately selecting the PCBs for the first traffic channel and the frame reception result indicator bits for the second fraffic channel in the MUXl 1010. Eight PCBs for the first traffic channel alternate with eight frame reception result indicator bits for the second traffic channel in the frame.
- PCBs and the frame reception result indicator bits are identical in number (8:8) and alternate with each other, they may be allocated differently in number and pattern.
- the PCBs and the frame reception result indicator bits are assigned 3 : 1 in number. This embodiment also applies to the case with traffic channel more than two and the case that frame reception result indicator bits are transmitted for the first traffic channel and PCBs for the second traffic channel.
- the first to fourth embodiments of the reverse transmit frame generating device in the mobile station according to the present invention have been described above based on the premise that the second traffic channel frame has CRC information. Due to lack of energy measurement symbols as mentioned earlier in the second traffic channel frame, it is impossible to obtain frame reception result indicator bits for the second traffic channel if it is released. In this case, there is no need for transmitting the reception result of the second traffic channel frame. Consequently, 16 control bits are assigned as the frame reception result indicator bits for the first traffic channel frame in one frame as in the conventional method of transmitting the reception result of the first traffic channel frame.
- FIG. 7C is a block diagram of an embodiment of the input reverse frame receiver in the base station in conjunction with the transmitter in the mobile station shown in FIG. 7A according to the present invention.
- a multiplier 716 despreads an input reverse frame with the same PN code as used in the receiver.
- the reverse frame is in the format shown in FIG. 4B.
- a second demultiplexer (DEMUX2) 718 demultiplexes the despread signal in time into a pilot signal and multiplexed frame reception result indicator bits.
- a first demultiplexer (DEMUX1) 720 demultiplexes the separated multiplexed frame reception indicator bits into frame reception indicator bits for the first traffic channel and frame reception indicator bits for the second traffic channel.
- the DEMUX1 720 and the DEMUX2 718 may be incorporated to an equivalent 3- way DEMUX.
- a reverse frame in the format shown in FIG. 4B is applied to the input of the multiplier 716.
- the multiplier 716 despreads the input reverse frame with the PN code used in the receiver by multiplying them.
- the DEMUX2 718 demultiplexes in time the despread signal.
- the demultiplexing in time refers to the process of separating the pilot signal from the despread signal, that is, extracting the multiplexed frame reception indicator bits for the first and second traffic channels inserted into the pilot signal on a bit basis in the input signal. This is possible by controlling the DEMUX2 718 to output the multiplexed frame reception indicator bits to an output terminal thereof at the end of a predetermined period while outputting the pilot signal to the other output terminal.
- a period of extracting the frame reception indicator bits inserted on a bit basis can be changed depending on design. For example, if one PCG is 1.25ms in duration, the period is about 0.0694ms (dividing 1.25ms by 18). Hence, the pilot signal is output for (1.25ms-about 0.0694ms) and then the frame reception indicator bits are extracted for the remainder period of about 0.0694ms.
- the DEMUX 1 720 demultiplexes the multiplexed frame reception indicator bits into the frame reception indicator bits for the first traffic channel and the frame reception indicator bits for the second traffic channel. Diverse demultiplexing operations can be produced depending on methods of controlling the DEMUX1 720. According to this embodiment, the demultiplexing is performed such that the frame reception indicator bits for the second traffic channel follows those for the first traffic channel. DEMUX control bits as many as the frame reception indicator bits for the first traffic channel and DEMUX control bits as many as the frame reception indicator bits for the second traffic channel are needed for implementation of the demultiplexing. For example, if there are eight frame reception indicator bits for the first traffic channel and eight frame reception indicator bits for the second traffic channel, 16 control bits are needed to control the DEMUX1 720.
- control bits used to select the frame reception indicator bits for the first and second traffic channels, respectively can be freely determined. Though not shown, a controller is required for control of the DEMUX 1 720, regardless of whether the controller provides overall control to the transmitter or separately for the DEMUX1 720 only.
- the final frame reception indicator bits for the first and second traffic channels are used to control gains " bf the first and second traffic channels, which is well known and thus will not be described herein.
- the reverse frame processing device operates with respect to a reverse frame having consecutive frame reception indicator bits for the second traffic channel frame following consecutive frame reception indicator bits for the first traffic channel. It may also operate with a reverse frame having the frame reception indicator bits for the first traffic channel alternating with those for the second traffic channel by controlling the DEMUX 1 720 to alternately select the frame reception indicator bits for the first and second traffic channels to different output terminals thereof.
- a reverse frame is illustrated in FIG. 4C.
- FIG. 8C is a block diagram of another embodiment of the reverse frame receiver in the base station in conjunction with the transmitter of a mobile station shown in FIG. 8A according to the present invention.
- a multiplier 820 despreads an input reverse frame with the same PN code as used in the receiver.
- the reverse frame is in the format shown in FIG. 8B.
- a multiplier 822 demodulates the multiplexed frame reception result indicator bits with the first orthogonal code identical to that used for modulation in the receiver.
- a multiplier 824 demodulates the pilot signal with orthogonal code #0, W 0 .
- a DEMUX 826 demultiplexes the multiplexed frame reception indicator bits into the frame reception indicator bits for the first traffic channel and the frame reception indicator bits for the second traffic channel. The demultiplexing must correspond to the multiplexing in the receiver.
- a reverse frame in the format shown in FIG. 8B is applied to the input of the multiplier 820.
- the multiplier 820 despreads the reverse frame with the same PN code as used in the receiver by multiplying them.
- the multiplier 824 multiplies the despread reverse frame by W 0 , thereby removing the frame reception indicator bits modulated with a different orthogonal code and demodulating the pilot signal.
- the multiplier 822 multiples the despread reverse frame by the first orthogonal code, thereby removing the pilot signal and demodulating the frame reception indicator bits.
- the DEMUX 826 separates the frame reception result indicator bits for the first and second traffic channels from the output of the multiplier 822.
- the final frame reception indicator bits for the first and second traffic channels are used to control gains of the first and second traffic channels, which is well known and thus will not be described herein.
- FIG. 9C is a block diagram of a third embodiment of the reverse frame receiver in the transmitter in conjunction with the transmitter in the mobile station shown in FIG. 9A according to the present invention.
- a multiplier 924 despreads an input reverse frame with the same PN code as used in the receiver.
- the reverse frame is in the format shown in FIG. 9B.
- a multiplier 924 despreads an input reverse frame with the same PN code as used in the receiver.
- the reverse frame is in the format shown in FIG. 9B.
- a multiplier 926 demodulates the multiplexed signal including the frame reception result indicator bits for the first traffic channel frame and the first reverse traffic channel frame data by multiplying the despread signal by the first orthogonal code.
- a multiplier 928 demodulates the frame reception result indicator bits for the second traffic channel frame and the second reverse traffic channel frame data by multiplying the despread signal by the second orthogonal code.
- the first and second orthogonal codes are identical to those used for modulation in the receiver.
- a multiplier 930 demodulates the pilot signal with orthogonal code #0, W 0 .
- a DEMUX 1 932 demultiplexes the output of the multiplier 926 into the frame reception indicator bits for the first traffic channel and the first reverse traffic channel frame data.
- a DEMUX2 934 demultiplexes the output of the multiplier 928 into the frame reception indicator bits for the second traffic channel and the second reverse traffic channel frame data. The demultiplexing must correspond to the multiplexing in the receiver.
- a reverse frame in the format shown in FIG. 9B is applied to the input of the multiplier 924.
- the multiplier 924 despreads the reverse frame with the same PN code as used in the receiver by multiplying them.
- the multiplier 930 multiplies the despread reverse frame by W 0 , thereby removing the other signals modulated with different orthogonal codes and demodulating the pilot signal.
- the multiplier 926 multiples the despread reverse frame by the first orthogonal code, thereby demodulating only the multiplexed signal including the frame reception indicator bits fofthe first traffic channel and the first reverse traffic channel frame data.
- the multiplier 928 multiples the despread reverse frame by the second orthogonal code, thereby demodulating only the multiplexed signal including the frame reception indicator bits for the second traffic channel and the second reverse traffic channel frame data.
- the DEMUX 1 932 separates the frame reception result indicator bits for the first traffic channel and the first reverse traffic frame data from the output of the multiplier 926.
- the DEMUX2 934 separates the frame reception result indicator bits for the second traffic channel and the second reverse traffic frame data from the output of the multiplier 928.
- the final frame reception indicator bits for the first and second traffic channels are used to control gains of the first and second traffic channels, which is well known and thus will not be described herein.
- FIG. 1 OB is a block diagram of a fourth embodiment of the reverse frame receiver in the base station in conjunction with the transmitter in a mobile station shown in FIG. 10A according to the present invention.
- a multiplier 1016 despreads an input reverse frame with the same PN code as used in the receiver.
- the reverse frame is in the format shown in FIG. 4E.
- a DEMUX2 1018 demultiplexes in time the despread signal into the pilot signal and the multiplexed traffic channel control bits.
- a DEMUX 1 1020 demultiplexes the PCBs for the first traffic channel and the frame reception result indicator bits for the second fraffic channel.
- a reverse frame in the format shown in FIG. 4E is applied to the input of the multiplier 1016.
- the multiplier 1016 despreads the reverse frame with the same PN code as used in the receiver by multiplying them.
- the DEMUX2 1018 separates the multiplexed traffic channel control bits inserted on a bit basis and the pilot signal from the despread signal by controlling the DEMUX2 1018 to output the multiplexed frame reception indicator bits to an output terminal thereof at the end of a predetermined period while outputting the pilot signal to the other output terminal.
- a period of extracting the frame reception indicator bits inserted on a bit basis can be changed depending on design.
- the DEMUX 1 1020 demultiplexes the PCBs for the first traffic channel and the frame reception result indicator bits for the second fraffic channel.
- the demultiplexing can be implemented in diverse ways depending on how the DEMUX1 1020 is controlled. In this embodiment, the demultiplexing is implemented so that the PCBs and the frame reception result indicator bits are alternately selected.
- the PCBs for the first fraffic channel and the frame reception indicator bits for the second fraffic channel are used to control gains of the first and second fraffic channels. While the PCBs may have different values in different PCGs, each of the frame reception result indicator bits has the same value in one frame.
- a mobile station receiver receiving two or more channels from a base station transmitter, multiplexes frame reception result indicator bits for the channels prior to transmission so that the base station transmitter can control its transmission power based on the frame reception result indicator bits. Also, the mobile station receiver can multiplex frame reception result indicator bits and PCBs according to channels prior to transmission so that the base station may perform a slow power control and a fast power control for the different traffic channels at the same time. While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2000621281 DE60021281T2 (en) | 1999-11-16 | 2000-11-16 | DEVICE AND METHOD FOR POWER CONTROL IN MOBILEM COMMUNICATION SYSTEM |
BR0015608A BR0015608A (en) | 1999-11-16 | 2000-11-16 | Apparatus and method of power control in mobile communication system |
AU18960/01A AU767199B2 (en) | 1999-11-16 | 2000-11-16 | Power controlling apparatus and method in mobile communication system |
JP2001537885A JP4098524B2 (en) | 1999-11-16 | 2000-11-16 | Power control apparatus and method for mobile communication system |
CA 2391631 CA2391631C (en) | 1999-11-16 | 2000-11-16 | Power controlling apparatus and method in mobile communication system |
EP00981845A EP1234384B1 (en) | 1999-11-16 | 2000-11-16 | Power controlling apparatus and method in mobile communication system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019990050768A KR20010046841A (en) | 1999-11-16 | 1999-11-16 | Apparatus for reporting result of frame reception and method thereof in mobile communication system |
KR1999/50768 | 1999-11-16 | ||
KR2000/728 | 2000-01-07 | ||
KR1020000000728A KR20010068691A (en) | 2000-01-07 | 2000-01-07 | Apparatus and method for controlling power in mobile communication system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001037443A1 true WO2001037443A1 (en) | 2001-05-25 |
Family
ID=26636326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2000/001311 WO2001037443A1 (en) | 1999-11-16 | 2000-11-16 | Power controlling apparatus and method in mobile communication system |
Country Status (10)
Country | Link |
---|---|
US (2) | US6810264B1 (en) |
EP (1) | EP1234384B1 (en) |
JP (1) | JP4098524B2 (en) |
KR (1) | KR100459551B1 (en) |
CN (1) | CN100435491C (en) |
AU (1) | AU767199B2 (en) |
BR (1) | BR0015608A (en) |
CA (1) | CA2391631C (en) |
DE (1) | DE60021281T2 (en) |
WO (1) | WO2001037443A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004073205A2 (en) * | 2003-02-14 | 2004-08-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control for reverse packet data channel in cdma systems |
WO2005032010A1 (en) * | 2003-09-30 | 2005-04-07 | Utstarcom Korea Limited | Method of controlling power in a cdma-2000 system |
CN1541472B (en) * | 2001-07-04 | 2013-01-09 | 无限创造公司 | Dispersity coding for inverse multiplexing |
US9319920B2 (en) | 2003-03-06 | 2016-04-19 | Ericsson Ab | Communicating a broadcast message to change data rates of mobile stations |
US10075313B2 (en) | 2005-03-08 | 2018-09-11 | Qualcomm Incorporated | Pilot grouping and route protocols in multi-carrier communication systems |
Families Citing this family (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1234384B1 (en) * | 1999-11-16 | 2005-07-13 | Samsung Electronics Co., Ltd. | Power controlling apparatus and method in mobile communication system |
KR100459564B1 (en) * | 2000-06-21 | 2004-12-03 | 삼성전자주식회사 | apparatus and method for reporting service load to mobile station in mobile communication system |
US8249187B2 (en) | 2002-05-09 | 2012-08-21 | Google Inc. | System, method and apparatus for mobile transmit diversity using symmetric phase difference |
KR100627196B1 (en) * | 2001-05-31 | 2006-09-25 | 매그놀리아 브로드밴드, 인크. | Communication device with smart antenna using a quality-indication signal |
WO2003034677A1 (en) * | 2001-10-17 | 2003-04-24 | Sony Corporation | Transmitter and transmission control method, and receiver and reception control method |
US20030152102A1 (en) * | 2002-02-12 | 2003-08-14 | William Morgan | Method and apparatus for predicting a frame type |
US20040018850A1 (en) * | 2002-07-23 | 2004-01-29 | Ntt Docomo, Inc. | Method of deciding transmit power level, wireless terminal, base station, and mobile communications system |
US7505741B2 (en) * | 2002-11-01 | 2009-03-17 | Magnolia Broadband Inc. | Processing diversity signals using a delay |
US7092731B2 (en) * | 2003-03-06 | 2006-08-15 | Lucent Technologies Inc. | Method for improving capacity of a reverse link channel in a wireless network |
US7418067B1 (en) | 2003-04-14 | 2008-08-26 | Magnolia Broadband Inc. | Processing diversity signals at a mobile device using phase adjustments |
JP4367044B2 (en) * | 2003-07-23 | 2009-11-18 | 日本電気株式会社 | Communication system and transmission power control method |
UA83256C2 (en) * | 2003-10-02 | 2008-06-25 | Квелкомм Инкорпорэйтед | Systems and methods for communication control data for multiple data channels using a single control channel (variants) |
US7430430B2 (en) * | 2003-12-16 | 2008-09-30 | Magnolia Broadband Inc. | Adjusting a signal at a diversity system |
US7272359B2 (en) * | 2004-01-26 | 2007-09-18 | Magnolia Broadband Inc. | Communicating signals according to a quality indicator using multiple antenna elements |
US7558591B2 (en) * | 2004-10-12 | 2009-07-07 | Magnolia Broadband Inc. | Determining a power control group boundary of a power control group |
US7515877B2 (en) * | 2004-11-04 | 2009-04-07 | Magnolia Broadband Inc. | Communicating signals according to a quality indicator and a time boundary indicator |
US8150408B2 (en) * | 2005-03-08 | 2012-04-03 | Qualcomm Incorporated | Pilot grouping and set management in multi-carrier communication systems |
US8693383B2 (en) | 2005-03-29 | 2014-04-08 | Qualcomm Incorporated | Method and apparatus for high rate data transmission in wireless communication |
KR100703303B1 (en) * | 2005-04-28 | 2007-04-03 | 삼성전자주식회사 | Method of requesting allocation of uplink resources for extended real-time polling service in a wireless communication system |
US7616930B2 (en) * | 2005-05-24 | 2009-11-10 | Magnolia Broadband Inc. | Determining a phase adjustment in accordance with power trends |
US20060267983A1 (en) * | 2005-05-24 | 2006-11-30 | Magnolia Broadband Inc. | Modifying a signal by adjusting the phase and amplitude of the signal |
US7783267B1 (en) | 2005-06-23 | 2010-08-24 | Magnolia Broadband Inc. | Modifying a signal in response to quality indicator availability |
US7633905B1 (en) | 2005-09-02 | 2009-12-15 | Magnolia Broadband Inc. | Calibrating a transmit diversity communication device |
US7835702B1 (en) | 2005-09-15 | 2010-11-16 | Magnolia Broadband Inc. | Calculating a diversity parameter adjustment according to previously applied diversity parameter adjustments |
US7746946B2 (en) * | 2005-10-10 | 2010-06-29 | Magnolia Broadband Inc. | Performing a scan of diversity parameter differences |
US7630445B1 (en) | 2005-10-25 | 2009-12-08 | Magnolia Broadband Inc. | Establishing slot boundaries of slots of a diversity control feedback signal |
US7796717B2 (en) * | 2005-11-02 | 2010-09-14 | Magnolia Brandband Inc. | Modifying a signal according to a diversity parameter adjustment |
US7965987B2 (en) * | 2005-11-03 | 2011-06-21 | Magnolia Broadband Inc. | Amplifying a transmit signal using a fractional power amplifier |
US20070177544A1 (en) * | 2006-01-27 | 2007-08-02 | Dongzhe Cui | Using the repetition of an erasure indicator bit to enhance a power control command during handoff |
US7949069B2 (en) * | 2006-10-26 | 2011-05-24 | Magnolia Broadband Inc. | Method, system and apparatus for applying hybrid ARQ to the control of transmit diversity |
US8150441B2 (en) | 2006-11-06 | 2012-04-03 | Magnolia Broadband Inc. | Modifying a signal by controlling transmit diversity parameters |
US8199735B2 (en) * | 2006-12-12 | 2012-06-12 | Google Inc. | Method, system and apparatus for the control of transmit diversity |
US7663545B2 (en) * | 2006-12-26 | 2010-02-16 | Magnolia Broadband Inc. | Method, system and apparatus for determining antenna weighting for transmit diversity |
US8027374B2 (en) * | 2006-12-27 | 2011-09-27 | Magnolia Broadband Inc. | Method, system and apparatus for transmit diversity control |
US20080160990A1 (en) * | 2006-12-29 | 2008-07-03 | Yair Karmi | System, method and apparatus for identification of power control using reverse rate indication |
US7869535B2 (en) * | 2007-02-28 | 2011-01-11 | Magnolia Broadband Inc. | Method, system and apparatus for phase control of transmit diversity signals |
US7991365B2 (en) * | 2007-03-01 | 2011-08-02 | Magnolia Broadband Inc. | Method, system and apparatus for estimation of propagation path variability of a transmit diversity channel |
US20080227414A1 (en) | 2007-03-01 | 2008-09-18 | Yair Karmi | System, method and apparatus for transmit diversity control based on variations in propagation path |
US8750811B2 (en) * | 2007-03-14 | 2014-06-10 | Google Inc. | Method, apparatus and system for phase difference adjustment in transmit diversity |
US8699968B2 (en) | 2007-03-14 | 2014-04-15 | Google Inc. | Using multiple and a single feedback for UE uplink beamforming in soft handoff |
WO2008113022A1 (en) * | 2007-03-14 | 2008-09-18 | Magnolia Broadband Inc. | Method, apparatus and system for providing transmit diversity feedback |
US8032091B2 (en) | 2007-03-14 | 2011-10-04 | Magnolia Broadband Inc. | Method, apparatus and system for providing transmit diversity feedback during soft handoff |
US8036603B2 (en) * | 2007-03-15 | 2011-10-11 | Magnolia Broadband Inc. | Method, apparatus and system for providing feedback to a transmit diversity device |
US8046017B2 (en) * | 2007-03-15 | 2011-10-25 | Magnolia Broadband Inc. | Method and apparatus for random access channel probe initialization using transmit diversity |
WO2008113038A1 (en) * | 2007-03-15 | 2008-09-18 | Magnolia Broadband Inc. | Method of controlling a transmit diversity device |
US8032092B2 (en) * | 2007-12-06 | 2011-10-04 | Magnolia Broadband Inc. | System, apparatus and method for introducing antenna pattern variability |
US8442457B2 (en) | 2009-09-08 | 2013-05-14 | Google Inc. | System and method for adaptive beamforming for specific absorption rate control |
US8958757B2 (en) | 2010-05-10 | 2015-02-17 | Google Inc. | System, method and apparatus for mobile transmit diversity using symmetric phase difference |
WO2011150266A1 (en) | 2010-05-26 | 2011-12-01 | Magnolia Broadband Inc. | Method and apparatus for random access channel probe initialization using transmit diversity |
US9048913B2 (en) | 2010-07-06 | 2015-06-02 | Google Inc. | Method and apparatus for adaptive control of transmit diversity to provide operating power reduction |
US8849222B2 (en) | 2011-02-16 | 2014-09-30 | Google Inc. | Method and device for phase adjustment based on closed-loop diversity feedback |
EP3203665B1 (en) * | 2014-09-30 | 2020-02-12 | Kabushiki Kaisha Toshiba | Integrated circuit for wireless communication, wireless communication terminal, and wireless communication method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703902A (en) * | 1995-06-16 | 1997-12-30 | Qualcomm Incorporated | Method and apparatus for determining signal strength in a variable data rate system |
US5752170A (en) * | 1994-10-15 | 1998-05-12 | Nokia Mobile Phones Limited | Transmitters for radio telephone base stations |
US5812938A (en) * | 1994-07-11 | 1998-09-22 | Qualcomm Incorporated | Reverse link, closed loop power control in a code division multiple access system |
US5987333A (en) * | 1997-09-30 | 1999-11-16 | Nortel Networks Corporation/Corporation Nortel Networks | Communications power control |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3457357B2 (en) * | 1993-07-23 | 2003-10-14 | 株式会社日立製作所 | Spread spectrum communication system, transmission power control method, mobile terminal device, and base station |
US5893035A (en) * | 1996-09-16 | 1999-04-06 | Qualcomm Incorporated | Centralized forward link power control |
US6545986B1 (en) * | 1997-12-31 | 2003-04-08 | Verizon Laboratories Inc. | CDMA forward link power control |
US6181738B1 (en) * | 1998-02-13 | 2001-01-30 | Northern Telecom Limited | Reverse link power control using a frame quality metric |
JPH11236165A (en) * | 1998-02-23 | 1999-08-31 | Minolta Co Ltd | Image forming apparatus |
US6249894B1 (en) * | 1998-02-27 | 2001-06-19 | Motorola, Inc. | Method for determining a need to retransmit a message in a communication system |
US6914889B1 (en) | 1998-12-08 | 2005-07-05 | Lucent Technologies Inc. | Variable rate forward power control for multichannel applications |
US6148208A (en) * | 1998-12-21 | 2000-11-14 | Motorola, Inc. | Power control within a broad-band communication system |
US6151328A (en) * | 1998-12-31 | 2000-11-21 | Lg Information & Communications Ltd. | Apparatus and method for controlling power in code division multiple access system |
US6879577B2 (en) * | 1998-12-31 | 2005-04-12 | Lg Electronics Inc. | Method and apparatus for determining frame quality in mobile communication system |
US6590873B1 (en) * | 1999-02-05 | 2003-07-08 | Lucent Technologies Inc. | Channel structure for forward link power control |
US6493329B1 (en) * | 1999-08-23 | 2002-12-10 | Qualcomm Incorporated | Adaptive channel estimation in a wireless communication system |
JP3660171B2 (en) | 1999-09-22 | 2005-06-15 | 松下電器産業株式会社 | Communication apparatus and communication method |
EP1234384B1 (en) * | 1999-11-16 | 2005-07-13 | Samsung Electronics Co., Ltd. | Power controlling apparatus and method in mobile communication system |
US7590095B2 (en) * | 2000-02-14 | 2009-09-15 | Qualcomm Incorporated | Method and apparatus for power control of multiple channels in a wireless communication system |
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 |
KR100459564B1 (en) * | 2000-06-21 | 2004-12-03 | 삼성전자주식회사 | apparatus and method for reporting service load to mobile station in mobile communication system |
JP2004297231A (en) * | 2003-03-26 | 2004-10-21 | Nec Corp | Mobile communication system, radio base station apparatus and power control method used for them |
-
2000
- 2000-11-16 EP EP00981845A patent/EP1234384B1/en not_active Expired - Lifetime
- 2000-11-16 JP JP2001537885A patent/JP4098524B2/en not_active Expired - Lifetime
- 2000-11-16 BR BR0015608A patent/BR0015608A/en not_active Application Discontinuation
- 2000-11-16 US US09/714,313 patent/US6810264B1/en not_active Expired - Lifetime
- 2000-11-16 DE DE2000621281 patent/DE60021281T2/en not_active Expired - Fee Related
- 2000-11-16 WO PCT/KR2000/001311 patent/WO2001037443A1/en active IP Right Grant
- 2000-11-16 CA CA 2391631 patent/CA2391631C/en not_active Expired - Lifetime
- 2000-11-16 KR KR10-2002-7006313A patent/KR100459551B1/en active IP Right Grant
- 2000-11-16 AU AU18960/01A patent/AU767199B2/en not_active Expired
- 2000-11-16 CN CNB008157243A patent/CN100435491C/en not_active Expired - Lifetime
-
2004
- 2004-02-04 US US10/771,474 patent/US7657274B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5812938A (en) * | 1994-07-11 | 1998-09-22 | Qualcomm Incorporated | Reverse link, closed loop power control in a code division multiple access system |
US5752170A (en) * | 1994-10-15 | 1998-05-12 | Nokia Mobile Phones Limited | Transmitters for radio telephone base stations |
US5703902A (en) * | 1995-06-16 | 1997-12-30 | Qualcomm Incorporated | Method and apparatus for determining signal strength in a variable data rate system |
US5987333A (en) * | 1997-09-30 | 1999-11-16 | Nortel Networks Corporation/Corporation Nortel Networks | Communications power control |
Non-Patent Citations (2)
Title |
---|
See also references of EP1234384A4 * |
W. LEE, N.P. SECORD: "Performance of closed-loop power control for a multiple-channel mobile station in the cdma2000 system", WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, WCNC, 21 September 1999 (1999-09-21) - 24 September 1999 (1999-09-24), pages 908 - 912, XP002168645 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1541472B (en) * | 2001-07-04 | 2013-01-09 | 无限创造公司 | Dispersity coding for inverse multiplexing |
WO2004073205A2 (en) * | 2003-02-14 | 2004-08-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control for reverse packet data channel in cdma systems |
WO2004073205A3 (en) * | 2003-02-14 | 2005-01-27 | Ericsson Telefon Ab L M | Power control for reverse packet data channel in cdma systems |
US7299402B2 (en) | 2003-02-14 | 2007-11-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control for reverse packet data channel in CDMA systems |
US9319920B2 (en) | 2003-03-06 | 2016-04-19 | Ericsson Ab | Communicating a broadcast message to change data rates of mobile stations |
WO2005032010A1 (en) * | 2003-09-30 | 2005-04-07 | Utstarcom Korea Limited | Method of controlling power in a cdma-2000 system |
US10075313B2 (en) | 2005-03-08 | 2018-09-11 | Qualcomm Incorporated | Pilot grouping and route protocols in multi-carrier communication systems |
Also Published As
Publication number | Publication date |
---|---|
AU1896001A (en) | 2001-05-30 |
EP1234384A4 (en) | 2003-05-28 |
DE60021281T2 (en) | 2005-12-22 |
CN1390396A (en) | 2003-01-08 |
US7657274B2 (en) | 2010-02-02 |
US20040157635A1 (en) | 2004-08-12 |
CA2391631A1 (en) | 2001-05-25 |
JP4098524B2 (en) | 2008-06-11 |
DE60021281D1 (en) | 2005-08-18 |
EP1234384A1 (en) | 2002-08-28 |
JP2003514484A (en) | 2003-04-15 |
BR0015608A (en) | 2002-07-30 |
KR20020050288A (en) | 2002-06-26 |
CA2391631C (en) | 2009-10-20 |
AU767199B2 (en) | 2003-11-06 |
KR100459551B1 (en) | 2004-12-03 |
US6810264B1 (en) | 2004-10-26 |
EP1234384B1 (en) | 2005-07-13 |
CN100435491C (en) | 2008-11-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU767199B2 (en) | Power controlling apparatus and method in mobile communication system | |
KR100387057B1 (en) | Method and apparatus for determining reverse data rate in mobile communication system | |
US7995552B2 (en) | Apparatus and method for transmitting TFCI bits for a hard split mode in a CDMA mobile communication system | |
US7792085B2 (en) | Apparatus and method for symbol mapping TFCI bits for a hard split mode in a CDMA mobile communication system | |
JP3579028B2 (en) | Apparatus and method for allocating common packet channel in wideband code division multiple access mobile communication system | |
EP1624713B1 (en) | Radio base station device, communication terminal device, and control information transmission method | |
KR100396519B1 (en) | Apparatus for controlling time slot of sub frame randomly and method thereof in narrow band time division duplex code division multiple access system | |
US5831978A (en) | Method for multiplexing of parallel information streams in a CDMA system | |
KR20020004452A (en) | Apparatus and method for controlling forward power to support voice service and fast data service in mobile communication system | |
KR100662284B1 (en) | Method for coding channel in Time Division Duplex Mode and System for the same | |
RU2233540C2 (en) | Device and method for converting tfci indicator bits into characters for fixed division mode in cdma mobile communication system | |
KR20010046841A (en) | Apparatus for reporting result of frame reception and method thereof in mobile communication system | |
KR20010068691A (en) | Apparatus and method for controlling power in mobile communication system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU BR CA CN IN JP KR |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 18960/01 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: IN/PCT/2002/00450/DE Country of ref document: IN |
|
ENP | Entry into the national phase |
Ref document number: 2001 537885 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2391631 Country of ref document: CA Ref document number: 008157243 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020027006313 Country of ref document: KR Ref document number: 2000981845 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1020027006313 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2000981845 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 18960/01 Country of ref document: AU |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020027006313 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 662/DELNP/2005 Country of ref document: IN |
|
WWG | Wipo information: grant in national office |
Ref document number: 2000981845 Country of ref document: EP |