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公开(公告)号：JP2001186174A
公开(公告)日：2001-07-06
申请号：JP2000355219
申请日：2000-11-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CAO QIANG , CHARRIERE PATRICK , LIM SEAU SIAN
Abstract: PROBLEM TO BE SOLVED: To provide a data packet for a mobile telecommunication system. SOLUTION: The data packet, for instance, a length index field 16 of variable grain is prepared in the protocol data unit(PDU) of a universal mobile telecommunication system(UMTS), on the basis of a payload length to be transmitted. An additional field 14 of a single bit length is provided to show the grain of the length index field. Thus, the resolution of a header can be increased, while maintaining the overhead of extra field bits low. This method consists of a process (a) in which a data length is evaluated and a unit suitable to represent the length is selected from among a plurality of possible unit (32 and 34), a process (b) in which a grain field is set so as to define the suitable unit selected to show the data length (36 and 40), and a process (c) in which the length index field is set so as to show the data length (38 and 42).
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公开(公告)号：JP2001313968A
公开(公告)日：2001-11-09
申请号：JP2001071319
申请日：2001-03-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CAO QIANG , CHARRIERE PATRICK GEORGE V , LIM SEAU SIAN
IPC: H04J13/00 , H04B7/26 , H04J3/00 , H04M3/00 , H04W36/08 , H04W52/00 , H04W52/04 , H04W74/08 , H04Q7/22 , H04Q7/28
Abstract: PROBLEM TO BE SOLVED: To provide a method for operating a cellular mobile radiotelephone network characterized by including a step to perform a request to service from a mobile set, and a step to demodulate the burst of a message and then to passe the demodulated data to a radiotelephone network controller(RNC). SOLUTION: When the mobile set performs a handover within a cellular system, first, the mobile set searches a best cell to which it can be connected, next tries to transmit a message to the found best cell. In a CDMA cellular system, a likelihood to be received successfully by a cell having the random access channel(RACH) message of the mobile set is largely dependent on sending power. The cellular mobile radiotelephone network is disclosed. As a characteristic, the mobile set requests service by a format related to a first cell in which the mobile set is located by using data modulated on one common RACH. A base station in a cell adjacent to the first cell is composed so that the burst of the RACH message having the format related to the first cell is demodulated and the demodulated data are passed to the RNC. Thereby, mean power required for successfully transmitting the RACH message can be reduced.
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公开(公告)号：JP2001230703A
公开(公告)日：2001-08-24
申请号：JP2000381196
申请日：2000-12-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , MONOGIOUDIS PANTELIS
Abstract: PROBLEM TO BE SOLVED: To provide a device for inverse spread of a code series in a CDMA receiver and for preamble detection. SOLUTION: The receiver inside a code division multiple access(CDMA) communication system adopts this preamble detector for a random access channel (RACH, for instance). The RACH uses an orthogonal Gold code(OGC) series for a preamble signature series and/or spreads the preamble signature series by the OGC series. The preamble detector adopts fast orthogonal Gold transformation(FOGT) so as to inversely spread the preamble signature series (taking correlation with code numbers C1-C256, for instance) and also to generate a judgment statistic for detecting (identifying) the signature series used inside the preamble. The spread signals of the RACH are added to a code matching filter (CMF) matching a spread OGC series and the output signals of the CMF are sampled at a symbol rate. Fast Hadamard transformation(FHT) is applied to the sampled output of the CMF.
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公开(公告)号：GB2369011B
公开(公告)日：2002-09-11
申请号：GB0027697
申请日：2000-11-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , LIM SEAU SIAN , CAO QIANG , CHARRIERE PATRICK
Abstract: Battery operated user equipment is disclosed for use in a radio telecommunications network, including means for monitoring the state of charge of the battery and means for communicating state of charge data to a base station during call set up. The battery data can be used to inform a caller that, for example, a called user's apparatus has reduced or limited battery capacity and thus that the expected duration of a call is limited.
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公开(公告)号：AU1671100A
公开(公告)日：2000-10-04
申请号：AU1671100
申请日：1999-12-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , LIM SEAU SIAN , CAO QIANG
IPC: H04L29/08 , H04B7/005 , H04L1/16 , H04W28/04 , H04W52/48 , H04W52/50 , H04W74/08 , H04Q7/38 , H04Q7/32
Abstract: In a UMTS, the AICH is arranged to send, in addition to a signal acknowledging that a preamble from a mobile is at an acceptable strength, an additional signal indicating that the mobile is not currently permitted to send its message; this may apply when the BTS does not have hardware resources available. If the BTS can predict when the hardware will become available, the additional signal can include a time out (T) after which the mobile system can send its message signal.
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Patent Agency Ranking
公开(公告)号：DE60028179T2
公开(公告)日：2007-03-15
申请号：DE60028179
申请日：2000-03-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CAO QIANG , CHARRIERE PATRICK , LIM SEAU SIAN
IPC: H04B7/00 , H04J13/00 , H04B7/26 , H04J3/00 , H04M3/00 , H04W36/08 , H04W52/00 , H04W52/04 , H04W74/08
Abstract: When a mobile is switched on in a cellular system, it first searches for the best cell that it can connect to and then attempts to send a message to the best cell found. In CDMA cellular systems, the likelihood of a mobile's RACH message being successfully received by a cell is largely dependent on its transmit power. Unfortunately having all mobiles transmit at the maximum power possible is in many circumstances not only unnecessary but also unacceptable due to the resultant intra-cell interference generated. A cellular mobile telephone network is disclosed in which a mobile station requests service in data modulated on a common random access channel (RACH) in a format associated with first a cell in which the mobile station is located. Base stations in cells neighbouring the first cell, are configured to demodulate the RACH message burst having the format associated with the first cell, and to pass the demodulated data to a radio network controller (RNC). This enables the average power required for a successful RACH transmission to be reduced.
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公开(公告)号：GB2369008B
公开(公告)日：2002-09-11
申请号：GB0027688
申请日：2000-11-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CAO QIANG , CHARRIERE PATRICK , LIM SEAU SIAN
Abstract: Battery operated user equipment is disclosed for use in a radio telecommunications network, including means for monitoring the state of charge of the battery and means for communicating state of charge data to a base station during call set up.
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公开(公告)号：CA2323645A1
公开(公告)日：2001-05-23
申请号：CA2323645
申请日：2000-10-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CHARRIERE PATRICK , CAO QIANG , LIM SEAU SIAN
Abstract: In a data packet, e.g. a PDU of the UMTS, a length indicator field (16) of variable granularity is created, depending on the exact length of the payload to be transmitted. An additional field (14) is provided, a single bit in length, to indicate the granularity of the length indicator field. This increases the resolution of the header, whilst keeping low an overhead of extra field bits. The method of the invention comprises: a. assessing (32, 34) the length of the data to determine the appropriate units, from a plurality of possible units, in which the length should be expressed; b. setting (36, 40) a granularity field to define said appropriate units in which the length of the data is to be indicated; and c. setting (38, 42) the length indicator field to indicate the data length.
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公开(公告)号：DE69939031D1
公开(公告)日：2008-08-14
申请号：DE69939031
申请日：1999-12-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , LIM SEAU SIAN , CAO QIANG
Abstract: In a UMTS, the AICH is arranged to send, in addition to a signal acknowledging that a preamble from a mobile is at an acceptable strength, an additional signal indicating that the mobile is not currently permitted to send its message; this may apply when the BTS does not have hardware resources available. If the BTS can predict when the hardware will become available, the additional signal can include a time out (T) after which the mobile system can send its message signal.
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公开(公告)号：DE60028179D1
公开(公告)日：2006-06-29
申请号：DE60028179
申请日：2000-03-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BHATOOLAUL DAVID LAHIRI , CAO QIANG , CHARRIERE PATRICK , LIM SEAU SIAN
IPC: H04B7/00 , H04J13/00 , H04B7/26 , H04J3/00 , H04M3/00 , H04W36/08 , H04W52/00 , H04W52/04 , H04W74/08
Abstract: When a mobile is switched on in a cellular system, it first searches for the best cell that it can connect to and then attempts to send a message to the best cell found. In CDMA cellular systems, the likelihood of a mobile's RACH message being successfully received by a cell is largely dependent on its transmit power. Unfortunately having all mobiles transmit at the maximum power possible is in many circumstances not only unnecessary but also unacceptable due to the resultant intra-cell interference generated. A cellular mobile telephone network is disclosed in which a mobile station requests service in data modulated on a common random access channel (RACH) in a format associated with first a cell in which the mobile station is located. Base stations in cells neighbouring the first cell, are configured to demodulate the RACH message burst having the format associated with the first cell, and to pass the demodulated data to a radio network controller (RNC). This enables the average power required for a successful RACH transmission to be reduced.
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