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公开(公告)号：JP2001275154A
公开(公告)日：2001-10-05
申请号：JP2001029554
申请日：2001-02-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication method that can avoid problems caused by dependence on a layer 4 in order to process a lost packet as a result of hand-off. SOLUTION: In response to a hand-off request from a first base station to a second base station, at least one frame of a layer 2 in packets of a layer 3 directed to a wireless terminal passed down from the layer 3 to the layer 2 or from the wireless terminal is transferred, and this indicates that all frames of the layer 2 of the packets are transmitted in the layer 3 although they are not actually transmitted.
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公开(公告)号：JP2001251660A
公开(公告)日：2001-09-14
申请号：JP2001029557
申请日：2001-02-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: PROBLEM TO BE SOLVED: To provide a system that can efficiently apply paging to a wireless terminal with respect to wireless communications. SOLUTION: The method for performing paging on a wireless terminal of this invention is characterized in comprising a step (A) where a first base station is assigned to a wireless terminal as a first paging agent, a step (B) where the wireless terminal receives assignment of a first paging area, which includes the first paging agent and one base station located within a range where hand- off can be received for a first prescribed number of times from the first paging agent, and a step (C) where a second paging agent is assigned to the wireless terminal when the wireless terminal for moved to the outside of the first paging area and where the second paging agent is a base station capable of providing an optimum signal for communications when the wireless terminal finds itself to exist at the outside of the first paging area.
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公开(公告)号：JP2001258060A
公开(公告)日：2001-09-21
申请号：JP2001029556
申请日：2001-02-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: PROBLEM TO BE SOLVED: To provide a method and system for executing discovery of network, that can considerably reduce the cost of a wireless system in order to obtain information as to an adjacent base station. SOLUTION: A wireless terminal 101 informs a new base station 103-2, making a call hand-off about identification of an old base station 103-1 before the control is subject to hands-off as part of its hand-off processing. The wireless terminal completes the hands-off at that time to start a correspondence by the new base station. When the new base station has no confirmed recording on the old base station, the new base station establish trusting relation to the old base station to generate recording with respect to the old base station. Thus, the new base station recognizes the old base station as an adjacent base station, to execute hand-off with priority for the base station, in response to the control of the wireless terminal. Thus, the cost for the system engineering required in advance can be reduce substantially.
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公开(公告)号：JP2001258059A
公开(公告)日：2001-09-21
申请号：JP2001029555
申请日：2001-02-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: PROBLEM TO BE SOLVED: To provide a method for reducing the installation cost of a network by simplifying the architecture of the network. SOLUTION: The method where hands-off procedure in a network having 1st and 2nd base stations and a wireless mobile terminal is executed, is characterized in that the method includes a step (A), where a request of hand-off from the 1st base station to the 2nd base station is received from the mobile terminal and a step (B), where the 1st base station transmits security information to the 2nd base station.
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5.发明专利
公开(公告)号：BRPI0100211B8
公开(公告)日：2016-09-13
申请号：BR0100211
申请日：2001-01-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VANDERVEEN MICHAELA C , DAVIES STEPHEN WILLIAM
Abstract: método e aparelho para efetuar descoberta de rede pelo menos partes do mapa das estações base, isto é, quais estações base são vizinhas, é descoberto e atualizado utilizando um processo de transferência controlado por terminal sem fio. a parte do mapa que é descoberta por determinada estação base é de tipicamente seus vizinhos aos quais ela pode possivelmente transferir uma chamada a que estiver servindo. leva pelo menos uma transferência com cada dessas estações base vizinhas para a estação base determinada descobrir seu mapa local inteiro, isto é, todas as estações base com as quais a estação base determinada pode efetuar transferências. o processo de transferência de terminal sem fio é utilizado para fornecer a estação base com informações sobre outras estações base com as quais a estação pode ser cooperar para efetuar transferências. o processo de transferência pode posteriormente ser efetuado mais aceleradamente entre a estação base determinada e tais outras estações base utilizando a informação obtida. como parte do processo de transferência, o terminal sem fio informa à nova estação base, a qual ele está transferindo a chamada, a identidade da estação base anterior da qual o controle está sendo transferido. o terminal sem fio então completa a transferência e começa a ser servido pela nova estação base. se a nova estação base não tem um registro válido para a estação base anterior, ela forma um relacionamento de confiança com a estação base anterior e cria um registro para ela, assim, identificando-a como vizinha com a qual ela pode efetuar transferência acelerada em resposta ao controle de um terminal sem fio.
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Patent Agency Ranking
公开(公告)号：DE60142200D1
公开(公告)日：2010-07-08
申请号：DE60142200
申请日：2001-01-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
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公开(公告)号：CA2330723C
公开(公告)日：2004-08-17
申请号：CA2330723
申请日：2001-01-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VANDERVEEN MICHAELA C , DAVIES STEPHEN WILLIAM
Abstract: Paging areas aligned with wireless terminals are dynamically created. A firs t base station passes to the wireless terminal a list of all the base stations that it knows and are within a prescribed number of handoffs of the first base station. The wirele ss terminal uses this list to define its own "personal" paging area. Each time the wireless terminal emerges from a sleep state, it listens for the base station having the best signal and compares its identification against the list of base stations in its persona l paging area. If the best signal base station is on the list, any paging messages for the wireless terminal are automatically broadcast by that base station. Otherwise, the wireless terminal must conduct a handoff to that base station to obtain a new personal paging area centered on that base station with that base station as paging agent. Messages originati ng elsewhere in the network are forwarded to the paging agent for delivery to the wireles s terminal. The paging agent then instructs all known base stations within prescribed number of handoffs of it to page the wireless terminal. The wireless terminal, on hearing the page, will form a connection with the base station having the best signal for communicating. The base station having the best signal for communicating notifies the pagin g agent that it has established a connection with the wireless terminal, which leaves paging mode and becomes active.
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公开(公告)号：AU768919B2
公开(公告)日：2004-01-08
申请号：AU1676901
申请日：2001-02-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: The penalties associated with relying on layer-4 to handle packets lost as a result of a handoff can be reduced by forwarding, in response to a handoff request from a first base station to a second base station, at least one layer-2 frame of a layer-3 packet destined to/from the wireless terminal that has been passed down from layer-3 to layer-2, and so is indicated to have been transmitted at layer-3 even though not all of the layer-2 frames of the layer-3 packet have actually been transmitted. In one embodiment of the invention, each of the at least one layer-2 frames may be encapsulated together in a special layer-3 packet that is transferred from the first base to the second base station in the usual manner of inter-base-station communication. Advantageously, packets are not lost at layer-4 due to handoffs. Thus, layer-4 retransmissions are not required, and so delays in the network are reduced. Furthermore, if only the layer-2 frames that were not transmitted over the air to the wireless terminal by the first base station are transferred to the second base station, a savings may be had in use of the air interface.
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公开(公告)号：BR0100210A
公开(公告)日：2001-10-09
申请号：BR0100210
申请日：2001-01-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DAVIES STEPHEN WILLIAM , VANDERVEEN MICHAELA C
Abstract: Paging areas aligned with wireless terminals are dynamically created. A first base station passes to the wireless terminal a list of all the base stations that it knows and are within a prescribed number of handoffs of the first base station. The wireless terminal uses this list to define its own "personal" paging area. Each time the wireless terminal emerges from a sleep state, it listens for the base station having the best signal and compares its identification against the list of base stations in its personal paging area. If the best signal base station is on the list, any paging messages for the wireless terminal are automatically broadcast by that base station. Otherwise, the wireless terminal must conduct a handoff to that base station to obtain a new personal paging area centered on that base station with that base station as paging agent. Messages originating elsewhere in the network are forwarded to the paging agent for delivery to the wireless terminal. The paging agent then instructs all known base stations within prescribed number of handoffs of it to page the wireless terminal. The wireless terminal, on hearing the page, will form a connection with the base station having the best signal for communicating. The base station having the best signal for communicating notifies the paging agent that it has established a connection with the wireless terminal, which leaves paging mode and becomes active.
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公开(公告)号：AU1956700A
公开(公告)日：2000-09-14
申请号：AU1956700
申请日：2000-03-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LAROIA RAJIV , LI JUNYI , VANDERVEEN MICHAELA C
Abstract: In an orthogonal frequency division multiplexing (OFDM) based spread spectrum multiple access system the entire bandwidth is divided into orthogonal tones, and all of the orthogonal tones are reused in each cell. To reduce peak-to-average ratio at the mobile transmitter, each voice user is allocated preferably a single one, but no more than a very small number, of the orthogonal tones for use in communicating with the base station. Data users are similarly allocated tones for data communication, however, the number of tones assigned for each particular data user is a function of the data rate for that user. The tone assignment for a given user is not always the same within the available band, but instead the tones assigned to each user are hopped over time. More specifically, in the downlink, the tones assigned to each user are change relatively rapidly, e.g., from symbol to symbol, i.e., the user fast "hops" from one tone to another. However, in the uplink, preferably slow hopping is employed to allow efficient modulation of the uplink signal which necessitates the employing of additional techniques, such as interleaving, to compensate for the reduction in the intercell interference averaging effect. For data communication power control is employed in the uplink and/or downlink so that the transmission rate is increased, e.g., by increasing the number of symbols transmitted per tone per unit time or the coding rate, as a function of allocated power per tone and the corresponding channel attenuation.
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