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公开(公告)号：CA2313978A1
公开(公告)日：2001-01-27
申请号：CA2313978
申请日：2000-07-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , NARAYANASWAMY SHANKAR , VISWANATHAN HARISH , RUPP MARKUS
Abstract: A two layered segmentation technique coupled with a two layer error detecti on technique is used to implement the wired to wireless network interface. A wireless network divides network layer packets from a wired network into radio data link packets, and the information within the radio data link packets is divided into portions that can be placed into time slots. Error detection is performed on each of the time slo ts and also at the radio data link packet level to determine if there is an error within th e radio data link packet. Errors detected in any radio data link packet only requires retransmission of the radio data link packet in which the error was detected, and, advantageously, do not require retransmission of the entire network layer packet as would have been required in a system that mapped directly from network layer packets to time slots. Furthe r advantageously, the system is able to be employed by systems that utilize dynamic constellation mapping schemes which result in different time slots for the same user being mapped with different constellations, and so they have different bit t o symbol ratios. This is because such changes in the constellation mapping scheme are handled at the time slot level, and are not seen at the radio data link packet level. T he segmentation of the network layer packets into radio link packets is independent of the number and size of the time slots which will carry the radio link packets.
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公开(公告)号：CA2313818C
公开(公告)日：2007-07-10
申请号：CA2313818
申请日：2000-07-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VISWANATHAN HARISH , RUPP MARKUS , NARAYANASWAMY SHANKAR , KRISHNAMOORTHY RAJEEV , LI XIAODONG
Abstract: In a wireless communication system, the constellation mapping scheme employe d may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot i n different consecutive frames. In other words, several constellation mapping schemes ar e available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mappi ng used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known à priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.
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公开(公告)号：CA2244327C
公开(公告)日：2001-10-30
申请号：CA2244327
申请日：1998-07-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ROSENTHAL EUGENE J , NARAYANASWAMY SHANKAR
Abstract: A portable or other electronic device has two or more display devices or scr eens that can be used to display different subsets of image signals. The effect is that the d evice simulates the display capabilities of devices having much larger screens. The device has an open o r active configuration, in which the multiple screens are available for displaying image signals, an d a closed or inactive configuration, in which some or all of the multiple screens are folded toget her or otherwise stowed away to reduce the size of the device for storage and/or carrying. By simula ting large-display operations, electronic devices according to the present invention are capabl e of presenting more useable information to the user than is otherwise possible using prior art d evices having a single small screen.
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公开(公告)号：BR0002977A
公开(公告)日：2001-03-13
申请号：BR0002977
申请日：2000-07-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , VISWANATHAN HARISH , NARAYANASWAMY SHANKAR , RUPP MARKUS
Abstract: In a system in which the modulation scheme employed may change on a per-time-slot basis, a user's available data rate may change even if the user maintains the same number of time slots, because the capacity of the user's time slots may change. If one or more such changes in modulation scheme occurs, the data rate available to the user may no longer match his current data rate needs. Therefore, a method is disclosed for determining the number of time slots to assign to a user as a function of the user's current data rate requirement and the actual current cumulative data rate of the time slots currently assigned to the user. The user data rate requirement may further be a function of a quality of service (QoS) contracted for by the user. Thus, the assignment of the time slots within the frame is made dynamically and the number of time slots employed by a user is increased or decreased according to the user's current data rate requirements and the ability of the time slots already assigned to the user to meet those requirements.
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公开(公告)号：AU4869700A
公开(公告)日：2001-02-08
申请号：AU4869700
申请日：2000-07-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , NARAYANASWAMY SHANKAR , RUPP MARKUS , VISWANATHAN HARISH
IPC: H04B7/24 , H04L1/00 , H04L12/56 , H04W24/00 , H04W28/22 , H04W72/04 , H04W74/04 , H04B7/204 , H04L12/00
Abstract: In a system in which the modulation scheme employed may change on a per-time-slot basis, a user's available data rate may change even if the user maintains the same number of time slots, because the capacity of the user's time slots may change. If one or more such changes in modulation scheme occurs, the data rate available to the user may no longer match his current data rate needs. Therefore, a method is disclosed for determining the number of time slots to assign to a user as a function of the user's current data rate requirement and the actual current cumulative data rate of the time slots currently assigned to the user. The user data rate requirement may further be a function of a quality of service (QoS) contracted for by the user. Thus, the assignment of the time slots within the frame is made dynamically and the number of time slots employed by a user is increased or decreased according to the user's current data rate requirements and the ability of the time slots already assigned to the user to meet those requirements.
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Patent Agency Ranking
公开(公告)号：CA2314032A1
公开(公告)日：2001-01-27
申请号：CA2314032
申请日：2000-07-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RUPP MARKUS , VISWANATHAN HARISH , NARAYANASWAMY SHANKAR , KRISHNAMOORTHY RAJEEV
Abstract: In a system in which the modulation scheme employed may change on a per-time - slot basis, a user's available data rate may change even if the user maintains th e same number of time slots, because the capacity of the user's time slots may change. If one or more such changes in modulation scheme occurs, the data rate available to th e user may no longer match his current data rate needs. Therefore, a method is disclose d for determining the number of time slots to assign to a user as a function of th e user's current data rate requirement and the actual current cumulative data rate of the tim e slots currently assigned to the user. The user data rate requirement may further b e a function of a quality of service (QoS) contracted for by the user. Thus, the assignment of the time slots within the frame is made dynamically and the number of time slots employed by a user is increased or decreased according to the user's current data rate requirements and the ability of the time slots already assigned to the user to meet those requirements.
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公开(公告)号：CA2270641A1
公开(公告)日：1999-12-22
申请号：CA2270641
申请日：1999-05-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： NARAYANASWAMY SHANKAR
Abstract: An automatically advancing user interface for entering new data and editing pre-existing data in data entry fields on a display screen. Data is entered and/or edited in a universal handwriting capture widget. A plurality of text entry widgets corresponding to the different data entry fields are displayed on the screen. The user defines a sequentially ordered list of text entry widgets. At any given time only one text entry widget is selected as the current text entry widget based on the sequentially ordered list. The data in the current text entry widget is displayed in the handwriting capture widget. After the data has been entered and/or edited in the handwriting capture widget it is displayed in the current text entry widget. The current text entry widget is then automatically advanced by selecting as the current text entry widget the next text entry widget in the sequentially ordered list of text entry widgets.
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公开(公告)号：DE60014798T2
公开(公告)日：2005-06-09
申请号：DE60014798
申请日：2000-07-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , LI XIAODONG , NARAYANASWAMY SHANKAR , RUPP MARKUS , VISWANATHAN HARISH
Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.
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公开(公告)号：DE60014798D1
公开(公告)日：2004-11-18
申请号：DE60014798
申请日：2000-07-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , LI XIAODONG , NARAYANASWAMY SHANKAR , RUPP MARKUS , VISWANATHAN HARISH
Abstract: In a wireless communication system, the constellation mapping scheme employed may be changed on a per-time-slot basis, i.e., from time slot to time slot, so that the constellation used to encode the symbols of each time slot may be different for each time slot within a single frame and may be different for a particular time slot in different consecutive frames. In other words, several constellation mapping schemes are available, with each providing the ability to transmit a different number of bits per symbol, and the particular constellation mapping scheme employed for any time slot need be selected for that time slot only. The ability to use any particular constellation mapping scheme is dependent on the current channel quality. The particular constellation mapping used for the user data of the time slot may be indicated in the preamble of the time slot. To this end, each time slot may have its own preamble that is mapped with a constellation mapping scheme which is a) known Ù priori, b) may be the same for all time slots, and c) may be different from the constellation mapping scheme used to encode user data in the time slot. A receiver can determine the constellation mapping used for each time slot from solely from the preamble of the time slot.
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公开(公告)号：DE60000194T2
公开(公告)日：2002-12-12
申请号：DE60000194
申请日：2000-07-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KRISHNAMOORTHY RAJEEV , NARAYANASWAMY SHANKAR , RUPP MARKUS , VISWANATHAN HARISH
Abstract: A two layered segmentation technique coupled with a two layer error detection technique is used to implement the wired to wireless network interface. A wireless network divides network layer packets from a wired network into radio data link packets, and the information within the radio data link packets is divided into portions that can be placed into time slots. Error detection is performed on each of the time slots and also at the radio data link packet level to determine if there is an error within the radio data link packet. Errors detected in any radio data link packet only requires retransmission of the radio data link packet in which the error was detected, and, advantageously, do not require retransmission of the entire network layer packet as would have been required in a system that mapped directly from network layer packets to time slots.
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