公开(公告)号：JP2002152130A

公开(公告)日：2002-05-24

申请号：JP2001301134

申请日：2001-09-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GANDHI ASIF D ,  KAMEL RAAFAT E ,  KOSTIC ANDREW R ,  SALVARANI ALEXANDRO ,  THOMAS MATHEW ,  VITEBSKY STANLEY ,  WEAVER CARL FRANCIS

IPC: H04B7/005 ,  H04B7/26 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for determining initial power to be assigned to a second channel having a desired data rate. SOLUTION: The setting point of SNR is first calculated and this setting point is determined on the basis of the SNR setting point of a related main channel and a system offset value. Afterwards, the initial power is calculated on the basis of the calculated setting point.

公开(公告)号：JP2002124917A

公开(公告)日：2002-04-26

申请号：JP2001247522

申请日：2001-08-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHEN TAI-ANN ,  KYPING LEE ,  MEYERS MARTIN HOWARD ,  QIU ROBERT CAIMING ,  WEAVER CARL FRANCIS

IPC: H04L1/00 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To allow an external output control loop method for setting a target SIR using a measured FER to work sufficiently in a high-speed fading state. SOLUTION: A method for accelerating the output control using a channel state estimation scheme is provided, wherein the estimation of channel state is equivalent to measuring or estimating channel parameters including the speed of a moving station, Doppler diffusion, K factor, the number of multiplexed channels, and the intensity of each of multiplexed channel, but not limited to these parameters. One or more relation between the channel state and a target signal-to-interference ratio or between other control thresholds are determined. Using the determined relations, the target signal-to-interference ratio or other control thresholds are set. This method has the advantage of estimating or measuring the channel state at much shorter time intervals than service quality parameters such as a frame error rate and bit error rate, accelerating the output control and increasing the system capacity.

公开(公告)号：JP2000101512A

公开(公告)日：2000-04-07

申请号：JP26610299

申请日：1999-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS

IPC: H04B7/26 ,  H04B7/005 ,  H04W52/24 ,  H04W52/50 ,  H04Q7/34

Abstract: PROBLEM TO BE SOLVED: To appropriately set an initial power level by calculating an interference measure from pilot power received by a mobile station and setting the initial power level of a forward direction link based on the interference measure. SOLUTION: A base station starts (210) the setting process of a call in response to an access probe from the mobile station and appropriately sets (220) the initial power level by using a pilot parameter Ec/Io (energy per chip to interference density) received by the mobile station obtained within access probe transmission. Then, the base station calculates a difference between the Ec/Io received by the mobile station and the Ec/Io transmitted by the base station and calculates (230) the interference measure. Then, the base station uses the interference measure and appropriately sets the initial power level on a forward direction link traffic channel. In the case that the interference measure indicates the interference of a high level, a high initial power level is set for the forward direction link traffic channel.

公开(公告)号：JPH11331912A

公开(公告)日：1999-11-30

申请号：JP8794899

申请日：1999-03-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS

IPC: H04B7/12 ,  H04W36/30 ,  H04Q7/22 ,  H04Q7/36

Abstract: PROBLEM TO BE SOLVED: To improve an inter-frequency hand-off quality by minimizing repetitions of the inter-frequency hand-off between an existing connection frequency and a new connection frequency. SOLUTION: Communication units 103 and 104 of a multi-carrier CDMA system 100 perform transmitting and receiving operations via different frequency bands corresponding to different carriers. Radio signals corresponding to the different carriers are combined together by a combiner in the forward direction before these signals are transmitted from an antenna. In the opposite direction, signals received at the antenna are turned into signals corresponding to the different carriers through a filter. The same traffic channel is used for this connection as long as the communication units 103 to 105 are kept in the same cell in response to each call. When the units 103 to 105 move to another cell, an hand-off operation is carried out via the same or different frequency bands between a base station under the service that is controlled by a relevant communication unit and a base station of the new cell.

公开(公告)号：JP2001128219A

公开(公告)日：2001-05-11

申请号：JP2000264842

申请日：2000-09-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/12 ,  H04W52/14 ,  H04W52/40 ,  H04W52/50 ,  H04Q7/22 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To facilitate control of a forward link transmission output of a voice, control and data channel simultaneously communicated by a base station taking part in soft hand-off. SOLUTION: The method for controlling a down link transmission output of a wireless system includes a step (A) where a forward control channel instructs assignment of a multiple reverse output control channel when the forward control channel is sent from a sector of a set different from the forward data channel in relation to the forward control channel and a base station relating to the forward control channel takes part in soft hand-off and a step (B) where a transmission output of the forward channel is adjusted based on the reverse output control channel relating to the forward channel.

公开(公告)号：JP2001103004A

公开(公告)日：2001-04-13

申请号：JP2000270154

申请日：2000-09-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： NANDA SANJIV ,  REGE KIRAN M ,  WEAVER CARL FRANCIS

IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device which control signal power in a radio communication system. SOLUTION: An Eb/N0 detector 330 measures the quality measured value (Eb/N0) of a signal received by a receiver 320 in the base station 210 of the radio communication system, a processor 350 calculates an effective signal quality measured value for a certain time length, a 1st comparator 360 compares a model target signal quality measured value with the effective signal quality measured value, and an aggregating device 370 increases a target quality measured value only by one step-up size, when the effective signal quality measured value is smaller than the model target quality measured value or reduces the target quality measured value only by one step-down size, when the effective quality measured value is larger than the model target quality measured value to adjust the target signal quality measured value, while corresponding to a fact that the effective signal quality measured value is different from the model target signal quality measured value. A 2nd comparator compares the target signal quality measured value with a received signal quality measured value and sends the adjustment request of the signal power from a mobile terminal to the mobile terminal.

公开(公告)号：JP2001086062A

公开(公告)日：2001-03-30

申请号：JP2000217059

申请日：2000-07-18

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BI QI ,  EIBLING EDWARD ELLIS ,  KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  THOMAS MATHEW ,  WEAVER CARL FRANCIS

IPC: H04J13/00 ,  H03G3/30 ,  H04B7/005 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To obtain a system to avoid an overload state of a base station. SOLUTION: In a method for controlling the power level of a signal transmitted from the base station 200 in a wireless communication system, a set of signals to be amplified by an amplifier 150 is transmitted by the base station 200, the method is constituted by providing a step for changing the power level of the set of signals and the step for changing the power level to be changed is performed according to comparison between the power level of the set of signals and a threshold power level Pth determined, based on the maximum continuous power level of the amplifier independently on individual power control of each signal in the set of signals.

公开(公告)号：JP2001069078A

公开(公告)日：2001-03-16

申请号：JP2000210724

申请日：2000-07-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/12 ,  H04W52/36 ,  H04W52/40 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To reduce a dispersion among the strength levels of a plurality of base stations and to improve communication quality by means of rapidly controlling the strength by programming a transmission threshold strength level in each base station in a soft hand-off state. SOLUTION: The respective base stations 312, 314 and 316 program the threshold strength level, utilize the program by a prescribed method and adjust the transmission strength level. When a mobile terminal 126 requests the increase of a transmission level to the base stations 312 and 316 to secure communication quality and requests its reduction to the base station 314 to suppress fading or interference, each base station increases or reduces the level in accordance with each request and reports it to the processor 328 of a mobile exchange center 320. The processor 328 makes a decision to keep a min. threshold strength level value same from the data, reports it to the respective vase stations 312, 314 and 316 and sets the level to the decided threshold strength level. Then a succeeding strength control bit is waited.

公开(公告)号：JP2001069077A

公开(公告)日：2001-03-16

申请号：JP2000205957

申请日：2000-07-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H04L1/16 ,  H04B7/005 ,  H04B7/26 ,  H04L1/20 ,  H04L12/28

Abstract: PROBLEM TO BE SOLVED: To realize efficiency in a system and to save system resources by controlling power in a down-link or an up-link in accordance with the quality of first and second channels between a mobile station and base station. SOLUTION: In the case of the down-link in a communication system 8, when the first and second communication channels with the base station 10 are established, the mobile station 30 measures the quality of a service parameter in each channel with a measuring instrument 34, it is compared with previously set prescribed target quality, the difference is adopted as increment updating data to decide control data for controlling down-link transmission power and it is transmitted to the base station 10. The down-link power controller 14 adjusts transmission power by referring to increment offset data based on control data from the mobile station 30. In the case of the up-link. The up-link controller 36 of the mobile station 30 adjusts the transmission power of its own station by control data based on increment updating data from the base station 10 in the same way and executes the same processing as necessary or regularly afterward.

公开(公告)号：JP2000115860A

公开(公告)日：2000-04-21

申请号：JP27790599

申请日：1999-09-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  MEYERS MARTIN HOWARD ,  SANDERS CHARLES ALBERT ,  WEAVER CARL FRANCIS

IPC: H04B7/26 ,  H04W68/00 ,  H04Q7/38 ,  H04J13/00

Abstract: PROBLEM TO BE SOLVED: To enhance a successful rate of call transmission by reducing the time required for a mobile unit to update an overhead message before trying an access. SOLUTION: When transmission of an overhead message is scheduled based on a timing decided by a timer (402), an overhead message is selected from a queue (404), and the message is transmitted through a paging channel (412). When transmission of a message is not scheduled in that timing, a base station 400 discriminates whether or not an available mobile oriented message is in existence (406), the base station selects the mobile oriented message when it exists (408), and transmits the message through an interposed slot or slot piece (412). When no available mobile oriented message is in existence, an overhead message is selected from among a queue (410) and the mobile station transmits the message through an interposed slot or a slot piece (412).