Abstract:
This disclosure describes techniques for scheduling distribution of content to a plurality of devices in a communication network, such as a cellular-based wireless network. According to this disclosure, two or more distribution techniques may be used, and scheduling techniques are performed to determine which distribution technique to use for different content. For example, content can be broadcast to all devices on the network (broadcast), multicast within several cells of the network (multi-cell multicast), multicast in a specific cell of the network (single cell multicast), or unicast to one or more specific devices within specific cells of the network (unicast). The scheduling techniques described in this disclosure may improve content distribution by substantially maximizing the number of content requests that are satisfied, particularly when bandwidth is limited.
Abstract:
When a resource of limited capacity is shared by several users, it is possible for the usage rates of the users to exceed the resource's capacity, thereby causing an overload condition. In a system or method according to an embodiment of the invention, at least some of the users have a set of persistence vectors. When an overload condition is detected, the usage rate of at least one of these users is changed, at least in part according to the user's set of persistence vectors.
Abstract:
"método e equipamento para determinar uma taxa de transmissão do link reverso em um sistema de comunicação sem fio". bits de ocupação do link reverso são gerados independentemente por cada estação base (102, 104 e 106) e são indicativos de se a estação base transmissora (102, 104 e 106) chegou a um limite de capacidade do link reverso. em uma primeira modalidade exemplar, a estação remota (122) combina as componentes de multipercursos dos bits de ocupação do link reverso provenientes de cada uma das estações base transmissoras (102 , 104 e 106) em seu conjunto ativo e em resposta transmite um sinal de link reverso somente quando todos os bits de ocupação do link reverso indiquem que as estações base (102 , 104 e 106) no conjunto ativo da estação remota possuem capacidade do link reverso. em uma primeira modalidade alternativa, a estação remota pondera os sinais ocupados do link reverso de acordo com a intensidade do sinal da estação base (102, 104 e 106) que transmite o sinal ocupado e determina se deve transmitir com base na soma ponderada dos sinais ocupados.
Abstract:
En mobil brukerterminal (402) har tilgang til et pakkedatanett (450) via en eller flere nettaksesspunkter (404-412). Et eller flere kontrollpunkter (432-440) bestemmer hvilket eller hvilke nettaksesspunkt(er) brukerterminalen skal gis tilgang til. Kontrollen kan holdes i et aktuelt kontrollpunkt eller overføres til et annet slikt, etter hva som er hensiktsmessig. Fortrinnsvis har man flere rutere, hver med en tilordnet hjemmeagent (418-420) som bestemmer hvilke fjernagenter som det må gis tilgang til på vegne av hver brukerterminal (402). Flere fjernagenter (422-430) formidler pakker som mottas fra en brukerterminals hjemmeagent, til det kontrollpunkt som i øyeblikket kontrollerer kommunikasjonen med brukerterminalen.
Abstract:
In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay. Data transmission on the forward link is time multiplexed and the base station transmits at the highest data rate supported by the forward link at each time slot to one mobile station. The data rate is determined by the largest C/I measurement of the forward link signals as measured at the mobile station. Upon determination of a data packet received in error, the mobile station transmits a NACK message back to the base station. The NACK message results in retransmission of the data packet received in error. The data packets can be transmitted out of sequence by the use of sequence number to identify each data unit within the data packets.
Abstract:
A method for controlling transmission power of a remote station (122) in a soft handoff condition is provided. The method comprises receiving at the remote station (122) a power control command transmitted by each of the plurality of base stations (102, 104, 106), and increasing transmission energy of the remote station (122) only when each of the power control commands transmitted by the base stations in an Active Set of the remote station (122) requests an increase in the remote station transmission energy.
Abstract:
Embodiments disclosed herein relate to methods and systems for providing adaptive server selection in wireless communications. In an embodiment, an access terminal is configured to determine a forward link quality metric associated with each of a plurality of sectors serviced by a plurality of access points; assign credits to each sector in relation to the forward link quality metric; and change a data source control (DSC) value if the credits accumulated for a non-serving sector at a DSC change boundary is greater than a predetermined threshold, where the non-serving sector and the serving sector for the AT belong to different cells. The access terminal is further configured to change a data rate control (DRC) cover in accordance with the DSC change. The use of DSC provides an early indication of handoff, thereby allowing the service outage associated with server switching to be substantially reduced. A method for handoff is further disclosed using DSC as early indication of handoff, which also trigger multitasking forward traffic for the access terminal to all access points.
Abstract:
Un procedimiento (1700) para las comunicaciones inalámbricas en un punto de acceso, AP, que comprende: determinar (1710) si se borra una cobertura de control de velocidad de datos, DRC, transmitida desde un terminal de acceso, AT; determinar (1730) si se cumplen los criterios de borrado de cobertura en relación con la cobertura DRC, si se borra la cobertura DRC; determinar (1740) si se borra un valor de control de fuente de datos, DSC, transmitido desde el terminal de acceso, si se cumplen los criterios de borrado de cobertura; multidifundir (1760) trafico directo al AT desde una pluralidad de sectores que están en la célula servida por el punto de acceso y en un conjunto activo del AT, si se borra el valor DSC; y programar (1720) la transmisión del AT desde un sector asociado con la cobertura DRC, si no se borra la cobertura DRC.
Abstract:
Embodiments disclosed herein relate to methods and systems for providing adaptive server selection in wireless communications. An access terminal may be configured to determine a forward link quality metric associated with each of a plurality of sectors serviced by a plurality of access points; assign credits to each sector in relation to the forward link quality metric; and change a data source control (DSC) value if the credits accumulated for a non-serving sector at a DSC change boundary is greater than a predetermined threshold, where the non-serving sector and the serving sector for the access terminal belong to different cells. The access terminal may be further configured to change a data rate control (DRC) cover in accordance with the DSC change. The use of DSC may provide an early indication of handoff, thereby allowing the service outage associated with server switching to be substantially reduced.