公开(公告)号：DE60212571D1

公开(公告)日：2006-08-03

申请号：DE60212571

申请日：2002-04-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAO QIANG ,  CHARRIERE PATRICK ,  LIM SEAU SIAN ,  SAPIANO PHILIP CHARLES

IPC: H04L1/18 ,  H04L1/16 ,  H04L12/64 ,  H04N7/24

Abstract: A radio telecommunications network comprises a transmitter (2) and a receiver (4). The transmitter (2) is operative to send signals indicative of data, and the receiver (4) is operative to receive the signals (12) and decode the signals to determine the data. The receiver (4) comprises indicator means to send to the transmitter (2) an indication of whether data has been correctly determined, and the transmitter (2) is operative to retransmit at least some data not correctly determined. The receiver (4) further comprises a buffer (14) operative to store the determined data. The buffer (14) is operative to output the determined data at a predetermined rate.

公开(公告)号：DE69926514T2

公开(公告)日：2006-06-08

申请号：DE69926514

申请日：1999-11-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  CAO QIANG ,  LIM SEAU SIAN ,  CHARRIERE PATRICK

IPC: H04L12/70 ,  H04L12/933 ,  H04Q11/04 ,  H04W28/02 ,  H04W88/18 ,  H04W92/04

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.

公开(公告)号：DE602004000324D1

公开(公告)日：2006-04-06

申请号：DE602004000324

申请日：2004-06-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAO QIANG ,  CHARRIERE PATRICK G V ,  LIM SEAU SIAN ,  SAPIANO PHILIP C

IPC: H04L12/56 ,  H04L1/18

Abstract: A method is provided of transmission of a data frame from a first station to a second station, in a code division multiple access (CDMA) telecommunications network. The network operates according to a hierarchical series of protocol processes including a physical layer process under the control of a radio link control (RLC) process. An indication of when a data frame is passed to the physical layer process for transmission to the second station is sent to the RLC process in the first station. Upon receipt of the indication the RLC process, a timer is started to time a predetermined period before again passing the data frame to the physical layer process for retransmission to the second station unless an acknowledgement of receipt from the second station is received.

公开(公告)号：DE69926514D1

公开(公告)日：2005-09-08

申请号：DE69926514

申请日：1999-11-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  CAO QIANG ,  LIM SEAU SIAN ,  CHARRIERE PATRICK

IPC: H04L12/70 ,  H04L12/933 ,  H04Q11/04 ,  H04W28/02 ,  H04W88/18 ,  H04W92/04 ,  H04Q7/22 ,  H04L12/56

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.

公开(公告)号：GB2384650A

公开(公告)日：2003-07-30

申请号：GB0201880

申请日：2002-01-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CAO QIANG ,  CHARRIERE PATRICK ,  LIM SEAU SIAN

IPC: H04B7/005 ,  H04W36/18 ,  H04W52/04 ,  H04W52/40 ,  H04Q7/38

Abstract: A telecommunications network comprises a base-station and a mobile station in use in call connection on at least one uplink channel for communicating user data. The base station is operative such that on receipt of a command to transfer to and/or add to al least one other uplink channel for communicating user data, said at least one other uplink channel is allocated to the call connection after a predetermined period during which power level adjustment is undertaken to compensate for mobile station movement. The network may be UMTS or UTRAN and the data channels may be DPDCHs. A RNC sends the power control preamble (PCP) length to both the base-station and mobile station this enables the base-station to allocate the new channel after the power level adjustment.

公开(公告)号：GB2369010B

公开(公告)日：2002-10-09

申请号：GB0027695

申请日：2000-11-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  LIM SEAU SIAN ,  CAO QIANG ,  CHARRIERE PATRICK

IPC: H04M1/725 ,  H04Q7/32 ,  H04Q7/38 ,  H04Q7/22

Abstract: User equipment for use in a mobile communication network has a data store 20 and a processor 2 for writing data received from a base station in the network to the store. Non-urgent data may be sent to the user equipment at times of low network activity, for example at night. Accordingly, the processor is responsive to downlink signalling during the setting up of a data transfer call to inhibit any audible alert.

公开(公告)号：GB2369009A

公开(公告)日：2002-05-15

申请号：GB0027690

申请日：2000-11-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  CAO QIANG ,  CHARRIERE PATRICK ,  LIM SEAU SIAN

IPC: H04W72/08 ,  H04Q7/32 ,  H04Q7/22

Abstract: User equipment for use in a mobile communication network has a data store 20 and a processor 2 for writing data received from a base station in the network to the store. The user equipment comprises means for monitoring the condition of radio channels between it and the base station and reporting to the base station. A call is only allowed if the quality meets a predefined criterion. The channel having the highest quality may also be reported to the base station.

公开(公告)号：AU2491101A

公开(公告)日：2001-09-20

申请号：AU2491101

申请日：2001-03-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BHATOOLAUL DAVID LAHIRI ,  LIM SEAU SIAN ,  VENCESLAS PATRICK GEORGES ,  CAO QIANG

IPC: H04J13/00 ,  H04B7/26 ,  H04J3/00 ,  H04M3/00 ,  H04W36/08 ,  H04W52/00 ,  H04W52/04 ,  H04W74/08 ,  H04Q7/36

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.

公开(公告)号：CA2333335A1

公开(公告)日：2001-09-14

申请号：CA2333335

申请日：2001-01-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHARRIERE PATRICK GEORGES VENC ,  BHATOOLAUL DAVID LAHIRI ,  LIM SEAU SIAN ,  CAO QIANG

IPC: H04J13/00 ,  H04B7/26 ,  H04J3/00 ,  H04M3/00 ,  H04W36/08 ,  H04W52/00 ,  H04W52/04 ,  H04W74/08 ,  H04Q7/38

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 interferen ce 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 form at 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 demodulate d data to a radio network controller (RNC). This enables the average power required for a successful RACH transmission to be reduced.

公开(公告)号：AU727429B2

公开(公告)日：2000-12-14

申请号：AU8958698

申请日：1998-10-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BADEN CHARLOTTE ,  CAO QIANG ,  FREIDBERG LORENZ FRED ,  READER DAVID JONATHON

IPC: H04B7/212 ,  H04B7/216 ,  H04J3/00 ,  H04J3/02 ,  H04J3/24 ,  H04L12/56 ,  H04L29/10 ,  H04M1/00 ,  H04W74/00 ,  H04W74/04 ,  H04W80/00 ,  H04W84/04 ,  H04W99/00 ,  H04Q7/36

Abstract: The invention relates to mobile cellular communication systems in which asymmetric access to a time division duplex (TDD) communication channel is provided. The channel is divided (by TDD) into slots which are allocated to either uplink communication or downlink communication by the base station in each cell. Timing of slots, and thus of compulsory uplink and downlink slots, is coordinated across the cells of a system.