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公开(公告)号：BR0003310A
公开(公告)日：2001-02-20
申请号：BR0003310
申请日：2000-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , NANDA SANJIV , RUBIN HARVEY , VITEBSKY STANLEY
Abstract: A back haul architecture effectively reduces the reactivation times for both forward-link and reverse-link data transmissions over CDMA wireless communications systems, by relying on packet-mode transmissions over the back haul between a frame selection/distribution (FSD) function and the appropriate base stations for both forward-link data and reverse-link data. In particular, for the forward direction, the FSD function transmits forward-link data only to one base station (i.e., the primary base station), which is solely responsible for controlling the forward-link air interface with the corresponding mobile unit. As such, the forward link always operates in simplex mode for data transmissions, independent of how many base stations are operating in soft handoff for the reverse link with the same mobile unit. For the reverse direction, each base station that receives frames of reverse-link data from the mobile unit, assigns a time tag to the frame, divides the frame into one or more data packets, assigns a different sequence number to each data packet, and transmits the data packets to the FSD function over the back haul, all without first synchronizing time with any other base station that is also operating in reverse-link soft hand-off with that mobile unit. The FSD function (or preferably the radio link protocol (RLP) function) is then responsible for selecting packets of reverse-link data for subsequent processing (e.g., transmission to the network end of the connection). By limiting forward-link data transmissions to simplex mode and using packet-mode transmissions for reverse-link data, the need to first synchronize timing between the various base stations is eliminated for both forward-link and reverse-link data transmissions. As a result, reactivation delays are greatly reduced.
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公开(公告)号：DE60044326D1
公开(公告)日：2010-06-17
申请号：DE60044326
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF D , IBANEZ MARC BENEDICT , SONG LEI , THOMAS MATHEW , VITEBSKY STANLEY
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公开(公告)号：DE69931107T2
公开(公告)日：2007-02-01
申请号：DE69931107
申请日：1999-07-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , NANDA SANJIV , VITEBSKY STANLEY
Abstract: Bursts of additional bandwidth (e.g., one or more supplemental channels or a channel having variable bandwidth) is assigned to users (e.g., high-speed data users) in a cellular telecommunication system. A request for assignment of additional bandwidth may be an initial request, a continuation request for an on-going burst, or a retry requests after a previously rejected request. In any case, it is determined whether to grant or reject the request. If the request is rejected, instructions are given to submit a retry request after a specified back-off time. The present invention may be implemented using either an asynchronous approach or a synchronous approach. According to the asynchronous approach, all requests are handled asynchronously. According to the synchronous approach, initial requests are handled asynchronously, but continuation requests and retry requests are handled synchronously at epoch times that coincide with specific time slots.
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公开(公告)号：DE60112034D1
公开(公告)日：2005-08-25
申请号：DE60112034
申请日：2001-08-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： NEWBURY MARK E , VITEBSKY STANLEY
Abstract: To take advantage of hierarchical cell layers, an inter-layer handoff system determines a cell layer for servicing a wireless unit at least as a function of the duration that the wireless unit is in a cell or set of cells of a cell layer. For example, as a function of the duration that the wireless unit is in the cell or set of cells for a first cell layer, a determination is made as to whether the wireless unit should be serviced by a cell or set of cells of a second cell layer. As such, wireless units moving at higher speeds which will be handed off frequently in a smaller cell layer(s) are serviced by a larger cell layer(s). Thus, the hierarchical cellular communications system can have the increased capacity provided by the smaller cell layer(s) while reducing the number of handoffs which would occur of the faster moving wireless units in the smaller cell layer(s). In certain embodiments, a timer starts when the wireless unit connects to a cell in a first layer, and the timer stops when the wireless unit disconnects from the cell. Depending on the amount of time that the wireless unit is in the cell of the first layer or a function thereof, the inter-layer handoff system determines whether the wireless unit should be serviced by another cell layer. For example, the network can compare a timer value(s) or a function thereof with threshold value(s) which are chosen such that the frequency of handoffs are below a certain level at each cell layer.
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公开(公告)号：DE60102786T2
公开(公告)日：2005-04-21
申请号：DE60102786
申请日：2001-08-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAMEL RAAFAT E , SALVARANI ALEXANDRO , THOMAS MATHEW , VITEBSKY STANLEY
Abstract: A method and apparatus estimate the initial power level and transmission rate of a burst on a secondary channel (182) when the secondary channel (182) is on fewer legs (132) of a handoff, such as a soft or softer handoff, than the primary channel (162, 164, 166). In accordance with the present invention, the initial power level of the burst transmitted over a current secondary channel (182) on a particular leg(s) is a function of a power level of a previous burst transmitted over a previous secondary channel on the identical leg(s) (132) as the current secondary channel (182). For example, the initial power level of the burst can be based on the power level at the end of the previous burst shortly prior to the termination of the previous burst, where the termination of the previous burst was within a predetermined time interval of the start of the burst. Optionally, the initial power level of a burst can also be additionally adjusted based on characteristics of the communication link of the primary channel (162), the previous secondary channel, and the current secondary channel (182). The transmission rate may then be adjusted based on the initial power level determined as described above to obtain a more efficient transmission rate.
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Patent Agency Ranking
公开(公告)号：DE60006315T2
公开(公告)日：2004-09-09
申请号：DE60006315
申请日：2000-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUMAR SARATH , NANDA SANJIV , RUBIN HARVEY , VITEBSKY STANLEY
Abstract: A back haul architecture effectively reduces the reactivation times for both forward-link and reverse-link data transmissions over CDMA wireless communications systems, by relying on packet-mode transmissions over the back haul between a frame selection/distribution (FSD) function and the appropriate base stations for both forward-link data and reverse-link data. In particular, for the forward direction, the FSD function transmits forward-link data only to one base station (i.e., the primary base station), which is solely responsible for controlling the forward-link air interface with the corresponding mobile unit. As such, the forward link always operates in simplex mode for data transmissions, independent of how many base stations are operating in soft handoff for the reverse link with the same mobile unit. For the reverse direction, each base station that receives frames of reverse-link data from the mobile unit, assigns a time tag to the frame, divides the frame into one or more data packets, assigns a different sequence number to each data packet, and transmits the data packets to the FSD function over the back haul, all without first synchronizing time with any other base station that is also operating in reverse-link soft hand-off with that mobile unit. The FSD function (or preferably the radio link protocol (RLP) function) is then responsible for selecting packets of reverse-link data for subsequent processing (e.g., transmission to the network end of the connection). By limiting forward-link data transmissions to simplex mode and using packet-mode transmissions for reverse-link data, the need to first synchronize timing between the various base stations is eliminated for both forward-link and reverse-link data transmissions. As a result, reactivation delays are greatly reduced.
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公开(公告)号：AT271286T
公开(公告)日：2004-07-15
申请号：AT03005755
申请日：2001-03-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GOPALAKRISHNAN NANDU , JOSHI NIRANJAN SUDHIR , KADABA SRINIVAS R , KOGIANTIS ACHILLES GEORGE , RUDRAPATNA ASHOK N , SUNAY MEHMET OGUZ , SUNDARAM GANAPATHY SUBRAMANIAN , VITEBSKY STANLEY
Abstract: Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits, via a forward link, an available power message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to-interference measurements and the available power message to determine a data rate that can be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile-telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to-interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.
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公开(公告)号：AT257988T
公开(公告)日：2004-01-15
申请号：AT01302473
申请日：2001-03-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GOPALAKRISHNAN NANDU , JOSHI NIRANJAN SUDHIR , KADABA SRINIVAS , KOGIANTIS ACHILLES GEORGE , RUDRAPATNA ASHOK N , SUNAY MEHMET OGUZ , SUNDARAM GANAPATHY SUBRAMANIAN , VITEBSKY STANLEY
Abstract: Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits, via a forward link, an available power message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to-interference measurements and the available power message to determine a data rate that can be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile-telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to-interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.
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公开(公告)号：AU9341901A
公开(公告)日：2002-06-06
申请号：AU9341901
申请日：2001-11-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BALOGH DAN ANTHONY , VITEBSKY STANLEY , KIANG T ROGER , BURGESS JOHN K
Abstract: Disclosed is a method for utilizing SCH resources more efficiently for supplemental channels (SCH) by minimizing gaps between data bursts due to overhead delays. Such gaps are minimized using a supplemental channel sharing algorithm to prospectively assign SCH resources supporting existing SCHs and to schedule future issuance of data notify requests DNRs such that currently unavailable SCH resources may be prospectively assigned based on states of the SCH resources, wherein an existing SCH is a SCH over which a data burst is currently being transmitted. For this purpose a data burst is followed by a preferred used assignment window (PUA), indicating the current user, a waiting user assignment window (WUA) and an expired reassignment window (ERA).
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公开(公告)号：CA2357092A1
公开(公告)日：2002-03-11
申请号：CA2357092
申请日：2001-08-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SUNAY MEHMET OGUZ , JOSHI NIRANJAN SUDHIR , SUNDARAM GANAPATHY SUBRAMANIAN , RUDRAPATNA ASHOK N , VITEBSKY STANLEY , KOGIANTIS ACHILLES GEORGE , GOPALAKRISHNAN NANDU , KADABA SRINIVAS R
IPC: H04B7/005 , H04B7/26 , H04W52/22 , H04W52/24 , H04W52/26 , H04W52/34 , H04W52/54 , H04L12/26 , H04B17/00 , H04L1/20 , H04Q7/36
Abstract: Disclosed is a method of integrating voice and data services onto a sam e frequency channel using available transmit power information to determine da ta rates, wherein the available transmit power information indicates an amount of transmit pow er available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits. via a forward link, an available powe r message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to- interference measurements and the available power message to determine a data rate that c an be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile- telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to- interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.
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