Abstract:
Un procedimiento para comunicación inalámbrica, que comprende: recibir un mensaje indicador (220, 320) basado en el éxito o fracaso de la descodificación de una ranura de datos actual (n-2) de un paquete de datos de múltiples ranuras; y terminar la transmisión de las ranuras restantes (n+2, n+6) del paquete de datos de múltiples ranuras si la descodificación de la ranura de datos actual es exitosa; caracterizado por que las ranuras de datos predeterminadas y las ranuras de hueco predeterminadas están entrelazadas en un patrón de ranura N uniforme en el paquete de datos de múltiples ranuras, y los datos actuales contenidos en la ranura de datos actual están programados para una pluralidad de retransmisiones, de modo que cada N-ésima ranura exitosa del paquete de datos de múltiples ranuras (400) está programada para ser una ranura de datos que contiene una retransmisión de los datos actuales.
Abstract:
Un procedimiento para aumentar la tasa de transferencia de datos de una red de comunicación, quecomprende las etapas de: recibir en un terminal de acceso (701) una pluralidad de segmentos de datos transmitidos por un punto deacceso (700), en donde la pluralidad de os de datos están divididas en una pluralidad de subconjuntos desegmentos de datos y los subconjuntos se intercalan entre sí para formar un paquete de múltiples segmentos(100, 200), en donde dichos subconjuntos están asociados respectivamente con diferentes conjuntos dedatos que están asociados respectivamente con diferentes usuarios, en donde el terminal de acceso estáasociado con un primer dicho usuario, en donde el primer usuario está asociado con un primer dichosubconjunto , y en donde los segmentos de datos de dichos subconjuntos distintos de dicho primersubconjunto definen segmentos de hueco con respecto al primer usuario; detectar un segmento de datos del primer subconjunto en el terminal de acceso, y transmitir desde el terminal de acceso al punto de acceso, durante un período asociado con uno de dichossegmentos de hueco, un mensaje indicador indicativo de un estado de recepción del conjunto de datosasociados con el primer subconjunto.
Abstract:
Un método para aumentar la tasa de transferencia de datos de una red de comunicación, que comprende lasetapas de: recibir en un terminal de acceso (701) una pluralidad de segmentos de datos y una pluralidad de segmentosde hueco transmitidos por un punto de acceso (700), en donde la pluralidad de segmentos de datos estánintercaladas con la pluralidad de segmentos de hueco para formar un paquete de múltiples segmentos (500),en donde la pluralidad de segmentos de datos definen un patrón aperiódico dentro del paquete de múltiplessegmentos, en donde los subconjuntos primero y segundo de la pluralidad de segmentos de datos estánasociados respectivamente con diferentes primer y segundo conjuntos de datos y definen respectivamenteprimer y segundo patrones periódicos diferentes dentro del paquete de múltiples segmentos y que setransmiten respectivamente a tasas de datos primera y segunda diferentes; detectar el paquete en el terminal de acceso; y transmitir desde el terminal de acceso al punto de acceso, durante un período asociado con uno de lossegmentos de hueco en el terminal de acceso, un mensaje indicador indicativo de un estado de recepción delpaquete.
Abstract:
In a high data rate communication system capable of variable rate transmission, an open loop rate control can be adjusted with a closed loop rate control to maximize throughput. An access point generates interleaved multi-slot packets that allow an access terminal to transmit indicator messages to the access point in accordance with recently received data carried within slots of the multi-slot packets.
Abstract:
A method and an apparatus of dynamically setting a rise-over-thermal (ROT) threshold to control user-to-user interferences in a wireless communication system are disclosed. The ROT threshold is set by determining whether an outage of communication has occurred, increasing the ROT threshold by a predetermined increment if the outage has not occurred, and decreasing the ROT threshold by a predetermined decrement if the outage has occurred.
Abstract:
In a high data rate communication system, a method and apparatus for improved throughput while transmitting data packets within multiple time slots. In order to avoid unnecessary retransmissions of a packet, a subscriber station sends a Stop-Repeat signal to a base station, causing the base station to cease further transmissions of the packet. In order to enable successful decoding of a packet, a subscriber station sends a Continue-Repeat signal to a base station, causing the base station to send retransmissions of the packet during time slots beyond a predetermined default number of time slots.
Abstract:
An efficient telecommunications receiver system for accurately decoding a received composite signal having a data signal component and a pilot signal component includes a first circuit for receiving the composite signal and extracting a pilot signal and a data signal from received composite signal. A second circuit calculates a log-likelihood ratio as a function of a channel estimate based on the pilot signal. A third circuit scales the log-likelihood ratio by a predetermined log-likelihood ratio scaling factor and provides an accurate log-likelihood value in response thereto. A fourth circuit decodes the received composite signal based on the accurate log-likelihood value and the data signal. The third circuit includes a carrier signal-to-interference ratio circuit for computing a first signal-to-interference ratio and a second signal-to-interference ratio based partly on the pilot signal.
Abstract:
A method for wireless communication, comprising: receiving data in multiple forward link timeslots; determining a quality metric of the received data; requesting retransmission of the data via a first request scheme if the quality metric indicates the data has not been received correctly; and if retransmission is requested and the data is not received correctly, requesting retransmission of the data via a second request scheme.
Abstract:
An code division multiple access (CDMA) communication apparatus (66) in which the apparatus (66) is arranged to receive (14, 56) a signal over a wireless channel, the received signal including a desired signal component and an interference component. The apparatus (66) is arranged to estimate (12) the carrier signal-to-interference and interference energy of the received signal to generate an interference energy value and a signal-to-interference ratio of the received signal, where estimating carrier signal-to-interference and interference energy includes extracting an estimate of the desired signal component from the received signal. The apparatus (66) is further arranged for generating summed weighted-path signals (42) in response to the interference energy value and the estimate of the desired signal component.
Abstract:
A method and apparatus for controlling the transmit power of a plurality of mobile radio units (800) transmitting to a base station (900) in a mobile radio telephone system. For each of the mobile units (800) in the system, a signal strength estimate is measured at the base station (900) based on reverse link signals sent from the mobile units (800) and received at the base station (900), wherein each signal strength estimate is associated with one of the mobile units (800). The signal strength estimate associated with each mobile unit (800) is compared to a threshold. Next, for each mobile unit (800) in the plurality of mobile units (800), if the signal strength estimate associated with the mobile unit (800) is greater than the threshold, then a power control bit having a first value is assigned to the mobile unit (800); conversely, if the signal strength estimate associated with the mobile unit is less than the threshold, then a power control bit having a second value is assigned to the mobile unit (800). A variable gain that is a function of the difference between the signal strength estimate associated with the mobile unit (800) and the threshold is next applied to each power control bit. The variable gain applied to each power control bit increases as the magnitude of the difference between the signal strength estimate associated with the mobile unit (800) and the threshold increases. Each gain-adjusted power control bit is then transmitted to the mobile units (800).