公开(公告)号：DE60100534D1

公开(公告)日：2003-09-04

申请号：DE60100534

申请日：2001-08-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  LI JUNYI ,  UPPALA SATHYADEV VENKATA

IPC: H04J3/00 ,  H04W68/00 ,  H04W68/02 ,  H04Q7/38

Abstract: Latency in receiving and detecting paging messages at a wireless terminal is reduced by employing a unique "super" paging time slot format. A paging super time slot includes a plurality of prescribed time slots. Each wireless terminal is associated with cyclically recurring super time slots. A super slot is associated with one or more wireless terminals. A base station always selects the first available time slot in a super time slot to transmit a paging message to a wireless terminal that is associated with the super time slot. Each wireless terminal monitors every time slot in the associated super time slot until either detecting reception of its associated paging message or detecting an empty time slot. In another embodiment of the invention, a unique partially overlapping super time slot format is employed in which a super time slot has at least one time slot common to its adjacent super time slots. This allows wireless terminals associated with adjacent super time slots to share the common at least one time slot. In turn, this results in balanced traffic loads, smoothed traffic fluctuation and reduced congestion.

公开(公告)号：CA2366343A1

公开(公告)日：2002-07-08

申请号：CA2366343

申请日：2001-12-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI JUNYI ,  LAROIA RAJIV ,  UPPALA SATHYADEV VENKATA

IPC: H04J11/00 ,  H04J3/00 ,  H04W52/02 ,  H04W68/02 ,  H04Q7/38

Abstract: In a unique paging time slot format, each of the allocated paging time slo ts occurs periodically and is split into several prescribed paging time slots including at least one first type paging time slot having a relatively short duration and at least one second type paging time slot having a longer duration. The at leas t one first type paging time slots is of relatively short duration and transports an indication whether a particular associated wireless terminal was paged. The second type paging time slot is of longer duration than the first type time slot and transports the entire paging message. Specifically, a wireless terminal that is normally in a standby mode only has to enter a monitor mode, i.e., "wake up" , to monitor the relatively short first type paging time slot to determine whethe r it has been paged. If it has been paged, the wireless terminal then monitors the longer second type paging time slot to determine if it is transporting a valid pagi ng message for the paged wireless terminal. If no valid paged indication is detected in the first type paging time slot or no valid paging message is detected in the second type paging time slot, the wireless terminal returns to the standby mode, i.e., returns to a "sleep" state, and waits for the next periodic occurrence of its assigned paging time slot.

公开(公告)号：AU8550301A

公开(公告)日：2002-05-09

申请号：AU8550301

申请日：2001-10-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  UPPALA SATHYADEV VENKATA ,  LI JUNYI

IPC: H04B7/26 ,  H04L12/18 ,  H04L12/28 ,  H04W68/00 ,  H04W74/00 ,  H04Q7/10

Abstract: In a wireless communications system, multicast messages are transported to groups of wireless terminals by employing a common control channel to transmit a multicast paging message indicating that multicast traffic data is to be transmitted to a particular group of wireless terminals. In an embodiment of the invention, the essential information transmitted in the common control channel is the identifier of the group of wireless terminals intended to receive the multicast traffic data and the location of a traffic channel on which the multicast traffic is to be transported in a channel resource which may include a representation of bandwidth and time interval. In accordance with an aspect of the invention, the common control channel is associated with a traffic channel in a prescribed fixed manner. Further, the traffic channel used for the purpose of multicast can be the same traffic channel used for the normal point-to-point transmission of traffic data.

公开(公告)号：BR0102383A

公开(公告)日：2002-04-23

申请号：BR0102383

申请日：2001-06-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  UPPALA SATHYADEV VENKATA ,  LI JUNYI

IPC: H04W24/00 ,  H04W28/04 ,  H04W68/00 ,  H04W72/04 ,  H04W74/00 ,  H04Q7/22

Abstract: In a wireless communication system, mobile unit and base station access request and page transmissions are addressed by employing an efficient unified approach for the transmission and detection of both access requests from a mobile unit and pages from a base station. To this end, a mobile unit monitors for access requests and monitors a prescribed resource to detect if a page has been received. Upon detection of an access request, a corresponding request message is generated and transmitting substantially immediately to a base station, thereby minimizing latency in the access process. Concurrently, a base station monitors to determine if a page indication has been received and monitors a prescribed resource to determine if an access request message has been received. In this process, the processing of request messages takes precedence over the processing of pages. Upon detecting a received request message a request response message is generated and transmitted substantially immediately to the mobile unit, thereby also minimizing latency in the access process.

公开(公告)号：CA2344844A1

公开(公告)日：2001-12-19

申请号：CA2344844

申请日：2001-04-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  LI JUNYI ,  UPPALA SATHYADEV VENKATA

IPC: H04W24/00 ,  H04W28/04 ,  H04W68/00 ,  H04W72/04 ,  H04W74/00 ,  H04Q7/38

Abstract: In a wireless communication system, mobile unit and base station access request and page transmissions are addressed by employing an efficient unified approach for the transmission and detection of both access requests from a mobile unit and pages from a base station. To this end, a mobile unit monitors for access requests and monitors a prescribed resource to detect if a page has been received. Upon detection of an access request, a corresponding request message is generated and transmitting substantially immediately to a base station, thereby minimizing latency in the access process. Concurrently, a base station monitors to determine if a page indication has been received and monitors a prescribed resource to determine if an access reques t message has been received. In this process, the processing of request messages takes precedence over the processing of pages. Upon detecting a received request message a request response message is generated and transmitted substantially immediately to t he mobile unit, thereby also minimizing latency in the access process.

公开(公告)号：BR0100361A

公开(公告)日：2001-10-02

申请号：BR0100361

申请日：2001-02-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  RANGAN SUNDEEP ,  UPPALA SATHYADEV VENKATA ,  LI JUNYI

IPC: H04J11/00 ,  H04B7/26 ,  H04L5/02 ,  H04L7/00 ,  H04L27/26

Abstract: An uplink synchronization and access control system is provided, in which mobile stations transmit certain timing and access signals in dedicated intervals in an uplink stream. Access control is illustratively implemented as a two-stage process, in which a given mobile first transmits a generic uplink access signal, in one of the intervals. If this access is accepted, the base station transmits an access acknowledgment, which contains initial timing and power corrections, along with initial channel assignments, on which the mobile can initiate a call set-up process. For re-synchronization, mobiles transmit timing synchronization signals in the dedicated timing and access intervals. The base station measures the arrival time of the signals, and sends back appropriate timing corrections. The invention thereby ensures that orthogonality between mobiles is maintained.

公开(公告)号：BR0100359A

公开(公告)日：2001-10-02

申请号：BR0100359

申请日：2001-02-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  RANGAN SUNDEEP ,  UPPALA SATHYADEV VENKATA ,  LI JUNYI

IPC: H04J11/00 ,  H04B7/26 ,  H04J3/06 ,  H04L5/02 ,  H04L7/10 ,  H04L27/26 ,  H04Q7/30

Abstract: Timing and access signals, to be transmitted in designated timing and access intervals, are constructed from orthogonal multitone signals. The multitone signals may be similar to multitone signals used in OFDM data transmission, except that a cyclic prefix, which is associated with reception of the signals in a base station, is extended to cover the timing errors of mobile stations not yet synchronized. Design techniques which optimize the time resolvability and peak-to-average ratio of the multitone signals, an efficient fast Fourier transform (FFT) based technique for maximum likelihood timing estimation, and a robust linear filtering technique for averaging timing estimates from different synchronizations, are also provided.

公开(公告)号：BR0006806A

公开(公告)日：2001-07-24

申请号：BR0006806

申请日：2000-12-15

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LAROIA RAJIV ,  LI JUNYI ,  RANGAN SUNDEEP ,  UPPALA SATHYADEV VENKATA

IPC: H04J11/00 ,  H04B1/7136 ,  H04B1/7143 ,  H04L5/02 ,  H04Q7/22

Abstract: Tone sequences in a frequency hopping arrangement are generated and assigned by advantageously employing a combination of a sequence generator and a sequence assignor to generate sequences and assign them on a time slot by time slot basis. In a transmitter, the sequence generator and sequence assignor, in combination with a user tone assignor are employed to generate and assign tone sequences to a user on a time slot by time slot basis. In a receiver, the sequence generator and sequence assignor, in combination with a user tone identifier are employed to generate sequences and to identify incoming tone sequences to a user on a time slot by time slot basis. Specifically, the sequence assignment in a time slot is such that a prescribed plurality of sequences is assigned to a particular user. This partitioning of the tasks facilitates the use of a sequence generator that generates sequences with the desirable properties of interference and frequency diversity and, which, leaves the task of properly assigning these sequences among one or more users to the sequence assignor. The sequence assignor functions in such a manner that the interference and frequency diversity properties for the one or more users are preserved, and this is further facilitated by assigning sequences in such a manner that they maximally overlap prior assigned sequences. In one example of the invention, a Latin square based sequence is generated in accordance with a first prescribed process. In an embodiment of the invention, a Latin cube based sequence is generated in accordance with a second prescribed process. In another embodiment of the invention, a Latin hypercube of prescribed dimension based sequence is generated in accordance with a third prescribed process. In still another embodiment of the invention, the principles of the invention are employed to realize frequency band hopping.

公开(公告)号：BRPI0006806B1

公开(公告)日：2016-06-14

申请号：BR0006806

申请日：2000-12-15

Applicant: FLARION TECHNOLOGIES INC ,  LUCENT TECHNOLOGIES INC ,  QUALCOMM INC

Inventor： LI JUNYI ,  LAROIA RAJIV ,  UPPALA SATHYADEV VENKATA ,  RANGAN SUNDEEP

IPC: H04J11/00 ,  H04B1/713 ,  H04B1/7136 ,  H04B1/7143 ,  H04L5/02

Abstract: aparelho e transceptor para uso em um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem por divisão de freqüência ortogonal seqüências de tom em um arranjo de variação de freqüência são geradas e atribuídas empregando-se vantajosamente uma combinação de um gerador de seqüência e um atribuidor de seqüência para gerar seqüências e atribuir as mesmas em uma base de intervalo de tempo por intervalo de tempo. em um transmissor, o gerador de seqüência e atribuidor de seqüência, em combinação com um atribuidor de tom de usuário são empregados para gerar e atribuir seqüências de tom a um usuário em uma base de intervalo de tempo por intervalo de tempo. em um receptor, o gerador de seqüência e atribuidor de seqüência, em combinação com um identificador de tom de usuário são empregados para gerar seqüências e identificar seqüências de tom de entrada a um usuário em uma base de intervalo de tempo por intervalo de tempo. especificamente, a atribuição de seqüência em um intervalo de tempo é tal que uma pluralidade determinada de seqüências é atribuída a um usuário específico. esta divisão das tarefas facilita o uso de um gerador de seqüência que gera seqüências com as propriedades desejáveis de interferência e diversidade de freqüência e, que, deixa a tarefa de atribuir adequadamente estas seqüências entre um ou mais usuários ao atribuidor de seqüência. o atribuidor de seqüência funciona de tal modo que as propriedades de diversidade de freqüência e interferência para um ou mais usuários são preservadas, e isto é adicionalmente facilitado pela atribuição de seqüências de tal modo que as mesmas sobreponham ao máximo seqüências atribuídas anteriores. em uma modalidade da invenção, uma seqüência baseada em quadrado latino é gerada de acordo com um primeiro processo determinado. em uma segunda modalidade da invenção, uma seqüência baseada em cubo latino é gerada de acordo com um segundo processo determinado. em uma terceira modalidade da invenção, um hipercubo latino de seqüência baseada em dimensão determinada é gerada de acordo com um terceiro processo determinado. ainda em outra modalidade da invenção, os princípios da invenção são empregados para realizar a variação de banda de freqüência.

公开(公告)号：BRPI0104819B1

公开(公告)日：2015-12-15

申请号：BR0104819

申请日：2001-10-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LI JUNYI ,  LAROIA RAJIV ,  UPPALA SATHYADEV VENKATA

IPC: H04B7/26 ,  H04L12/18 ,  H04L12/28 ,  H04W68/00 ,  H04W74/00

Abstract: "aparelho e método para uso na multidifusão de dados de tráfego em sistemas de comunicação sem fio de acesso múltiplo". num sistema de comunicações sem fio, as mensagens de multidifusão são transportadas para grupos de terminais sem fio empregando-se um canal de controle comum para transmitir uma mensagem de radiochamada de multidifusão, indicando que os dados de tráfego de multidifusão deverão ser transmitidos para um grupo específico de terminais sem fio. numa modalidade da invenção, a transmissão essencial transmitida no canal de controle comum é o identificador do grupo de terminais sem fio destinado a receber os dados de tráfego de multidifusão e a localização de um canal de tráfego no qual o tráfego de multidifusão deverá ser transportado num recurso de canal que possa incluir uma representação de largura de faixa e de intervalo de tempo. de acordo com um aspecto da invenção, o canal de controle comum está associado a um canal de tráfego de uma maneira fixa prescrita. além disso, o canal de tráfego usado para a finalidade de multidifusão pode ser o mesmo canal de tráfego usado para a transmissão normal ponto-a-ponto de dados de tráfego.