-
公开(公告)号：BR9803199A
公开(公告)日：1999-11-03
申请号：BR9803199
申请日：1998-08-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , REGE KIRAN M , KUO WEN-YI
Abstract: The present invention increases the success rate of soft handoffs by enhancing the ability of a mobile-telephone to receive a handoff direction message that identifies the traffic channel being assigned to enable a candidate base station to communicate with the mobile-telephone. Specifically, the aforementioned ability of the mobile-telephone is enhanced by using the candidate base station to transmit the handoff direction message on a communication channel belonging to the candidate base station and being listened to by the mobile-telephone. In situations where signals transmitted from active set base stations have a low signal-to-noise ratio at the mobile-telephone, signals transmitted from the candidate base station may have a higher signal-to-noise ratio at the mobile-telephone. In these situations, the transmission of the HD messages from the candidate base station increases the likelihood that a copy of the handoff direction message will be successfully received by the mobile-telephone, thereby enhancing the success rate of soft handoffs.
-
公开(公告)号：CA2249070A1
公开(公告)日：1999-04-17
申请号：CA2249070
申请日：1998-09-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUO WEN-YI
Abstract: A method for allocating utilization of multiple carriers in a wideband CDMA transmission system first determines the carrier utilization/interference levels for each of the multiple carriers. Based on the carrier utilization/interference level, carr ier assignments are allocated on an unequal basis. The allocation of the carrier ass ignment biases the selection of the carriers away from higher utilized/interfered carrie rs. An apparatus for implementing the method is also described.
-
公开(公告)号：DE69923927T2
公开(公告)日：2005-12-29
申请号：DE69923927
申请日：1999-12-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUO WEN-YI , MEYERS MARTIN HOWARD , WU XIAO CHENG
Abstract: The present invention is a method for efficiently utilizing spectrum resources belonging to a wireless communications system in the presence of data channels through a discontinuous data transmission technique. The discontinuous data transmission technique involves the transmission of a flag over a control channel (or some other communication channel) in frame f, wherein the flag would indicate to an intended recipient that a transmitter has a data frame to transmit to the recipient in some future frame f+q. In an embodiment, the transmitter would subsequently transmit the data frame over a data channel (or some other communication channel) in frame f+q if the flag indicated that the data frame was ready to be transmitted. In another embodiment, the transmitter would not transmit the data frame unless the recipient has indicated (via another flag) that the recipient is ready to receive the frame of data from the transmitter.
-
公开(公告)号：DE60012070D1
公开(公告)日：2004-08-19
申请号：DE60012070
申请日：2000-03-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHEN TSAO-TSEN , KUO WEN-YI , MEYERS MARTIN HOWARD
Abstract: The invention provides a novel methodology for increasing the performance of CDMA systems with packet data services by accommodating a variety of users with different rates. The invention operates to increase the spectrum efficiency of a wireless system by using an optimal transmission set of base transceiver stations and assigning proper data rates to efficiently utilize the radio resources. In particular, the invention operates to decrease interference so that the quality of data transmission in CDMA systems is advantageously maintained. Moreover, the invention operates to increase the allocation of bandwidth, particularly for high-speed data services. The invention provides a methodology to evaluate the data rates of different combinations of BTSs that may be in connection with a particular mobile station (MS), allocate an appropriate data rate for the MS and make allocation of system resources more efficient in a multi-user environment.
-
公开(公告)号：DE60011334D1
公开(公告)日：2004-07-15
申请号：DE60011334
申请日：2000-03-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CLOUTIER JOSEPH E , PATEL TEJASKUMAR , KUO WEN-YI
-
Patent Agency Ranking
公开(公告)号：CA2317142C
公开(公告)日：2004-04-13
申请号：CA2317142
申请日：2000-08-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： WU XIAO CHENG , KUO WEN-YI , KAMEL RAAFAT EDWARD , MEYERS MARTIN HOWARD , WEAVER CARL FRANCIS
IPC: H04B1/04 , H04B7/005 , H04B7/26 , H04W52/12 , H04W52/14 , H04W52/40 , H04W52/50 , H04Q7/36 , H04Q7/38
Abstract: A method and system for controlling downlink transmit power during a soft hand-off in a spread-spectrum wireless system supports independent power control of multiple forward channels to reduce fading. For a soft hand-off, a mobile switching center determines if a forward control channel is transmitted from different sectors of base stations than a forward data channel is. The base stations preferably adjust transmit powers of the forward channels grouped into different physical channels by receiving power control data over the allocated reverse power control channels to compensate for fading of the forward channels during a soft hand-off.
-
公开(公告)号：DE69805250T2
公开(公告)日：2002-11-07
申请号：DE69805250
申请日：1998-08-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , REGE KIRAN M , KUO WEN-YI
Abstract: The present invention increases the success rate of soft handoffs by enhancing the ability of a mobile-telephone to receive a handoff direction message that identifies the traffic channel being assigned to enable a candidate base station to communicate with the mobile-telephone. Specifically, the aforementioned ability of the mobile-telephone is enhanced by using the candidate base station to transmit the handoff direction message on a communication channel belonging to the candidate base station and being listened to by the mobile-telephone. In situations where signals transmitted from active set base stations have a low signal-to-noise ratio at the mobile-telephone, signals transmitted from the candidate base station may have a higher signal-to-noise ratio at the mobile-telephone. In these situations, the transmission of the HD messages from the candidate base station increases the likelihood that a copy of the handoff direction message will be successfully received by the mobile-telephone, thereby enhancing the success rate of soft handoffs.
-
公开(公告)号：CA2245241C
公开(公告)日：2002-10-15
申请号：CA2245241
申请日：1998-08-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , REGE KIRAN M , KUO WEN-YI
Abstract: The present invention increases the success rate of soft handoffs by enhancing the ability of a mobile-telephone to receive a handoff direction m essage that identifies the traffic channel being assigned to enable a candidate base sta tion to communicate with the mobile-telephone. Specifically, the aforementioned abil ity of the mobile-telephone is enhanced by using the candidate base station to transmit the handoff direction message on a communication channel belonging to the candidate base station and being listened to by the mobile-telehone. In situations where signals tr ansmitted from active set base stations have a low signal-to-noise ratio at the mobile -telephone, signals transmitted from the candidate base station may have a higher signal -to-noise ratio at the mobile-telephone. In these situations, the transmission of the HD messages from the candidate base station increases the likelihood that a copy of the handoff direction message will be successfully received by the mobile-telephone, the rebyenhancing the success rate of soft handoffs.
-
公开(公告)号：CA2317142A1
公开(公告)日：2001-03-02
申请号：CA2317142
申请日：2000-08-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： WEAVER CARL FRANCIS , WU XIAO CHENG , MEYERS MARTIN HOWARD , KAMEL RAAFAT EDWARD , KUO WEN-YI
IPC: H04B1/04 , H04B7/005 , H04B7/26 , H04W52/12 , H04W52/14 , H04W52/40 , H04W52/50 , H04Q7/36 , H04Q7/38
Abstract: A method and system for controlling downlink transmit power during a soft hand-off in a spread-spectrum wireless system supports independent power control of multiple forward channels to reduce fading. For a soft hand-off, a mobile switching center determines if a forward control channel is transmitted from different sectors of base stations than a forward data channel is. The base stations preferably adjust transmit powers of the forward channels grouped into different physical channels by receiving power control data over the allocated reverse power control channels to compensate for fading of the forward channels during a soft hand-off.
-
公开(公告)号：CA2313554A1
公开(公告)日：2001-01-19
申请号：CA2313554
申请日：2000-07-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： THOMAS MATHEW , WEAVER CARL FRANCIS , GANDHI ASIF DAWOODI , EIBLING EDWARD ELLIS , KUO WEN-YI
Abstract: A method that initiates call blocking responsive to a call-quality measureme nt of the forward link. The call-quality measurement is a measurement of how well a mobile terminal is able to receive the forward link. One call-quality measurement is a pilot fraction of the forward link, which is a ratio of the pilot's power level to the power level of a se t of forward-link signals of a base station. Call blocking is initiated when an average pilot fraction is below a pilot-fraction blocking threshold. The pilot's power level is obtained for a time period, a nd the signal set's power level is obtained for the same time period. The pilot fraction i s determined for the time period, and then used to determine the average pilot fraction for the time period. The average pilot fraction for the current time period is based on a pilot fraction for the current time period, and an average pilot fraction for a previous time period. When the average pilot fraction is below the pilot-fraction blocking threshold, call blocking is initiated. The pilot-fraction blocking threshold is preferably based on: 1) the pilot fraction when the ba se station is at full load; 2) the size, shape, and terrain of the cell; and 3) the aggressiveness of the overload control. In the preferred embodiment, the signal set includes allof the signals generated by the base station, alternatively, the signal set can include fewer than all the signal s generated by the base station. If the cell includes several sectors, the call blocking is initiate d on a sector basis when the average pilot fraction of the sector is below the pilot-fraction blockin g threshold. Other call-quality measurements, such as the forward link's frame error rate, the number of dropped calls, or the Power Measurement Report Message (PMRM), can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to determine whether call blocking should be initiated. Determining whether call blocking should be initiated using one of the other call-quality measurements is performed in a similar manner as for the pilot fraction. Initiating call blocking using several call-quality measurements involves initiating call blocking when any one of the call-quality measurements indicates that call blocking should be initiated. Alternatively, call blocking can be initiated when several of the call quali ty measurements indicate that call blocking should be initiated.
-
-
-
-
-
-
-
-
-
Search Results
114
records
(took 0.024 seconds)
