Abstract:
PROBLEM TO BE SOLVED: To provide a method for adaptive server selection in a wireless communication. SOLUTION: 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. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
Techniques for scheduling data transmission on multiple carriers in a wireless communication system are described. In one design, a scheduler may receive requested power headrooms for multiple carriers from a user equipment (UE), one requested power headroom for each carrier. Each requested power headroom may be indicative of transmit power usable by the UE for transmission on an associated carrier. The scheduler may also receive queue information indicative of data to transmit by the UE. The scheduler may redistribute the requested power headrooms across the multiple carriers (e.g., based on water filling or greedy filling) to obtain redistributed power headrooms for the multiple carriers. The scheduler may schedule the UE for data transmission on the uplink based on the redistributed power headrooms and the queue information. The scheduler may obtain and send at least one granted power headroom for at least one carrier to the UE.
Abstract:
Providing for fast allocation of additional carriers (402) in multi-carrier wireless' communication systems is de-scribed herein. By way of example, high layer protocols can be employed to allocate additional carriers to UEs (304) in a wire-less network. Additionally, management of the additional carriers can be accomplished via high, speed lower layer signaling proto-cols (206B). Management can involve acti-vating/deactivating the ' additional carriers, instructing the UE to provide carrier feed-back, monitor pilot or control channels of such carriers, or the like. Because lower layer signaling is relatively fast, activation or deactivation of the additional carrier can be quickly implemented in response to con-temporaneous changes in channel condi-tions. Thus, changes to signal quality or network loading can be determined and uti-lized to customize carrier activation in near real-time, providing efficient resource allo-cation' while conserving UE battery life.
Abstract:
Un procedimiento de comunicaciones inalámbricas, que comprende: proporcionar controles independientes de potencia para dos o más portadoras a partir de un conjunto de señales de acceso de paquetes; monitorizar la potencia entre las dos o más portadoras para determinar niveles de potencia para el conjunto de señales de acceso de paquetes; ajustar al menos uno entre un control de bucle abierto (280), un control de bucle interno (284) y un control de bucle externo (296), a la vista de los niveles de potencia para el conjunto de señales de acceso de paquetes; generar bits de aumento de potencia o de reducción de potencia en cada portadora, independientemente, como parte del control de bucle interno (284); generar uno o más puntos de fijación (430), mediante el control de bucle externo (400, 296) en una pluralidad de portadoras; ajustar la configuración de potencia de un canal físico de acceso aleatorio, PRACH (310), y de un canal de control físico dedicado, DPCCH (320), mediante el control de bucle abierto; y iniciar una portadora secundaria de enlace ascendente más tarde que una de anclaje, a fin de que la potencia inicial de una segunda portadora pueda ser dependiente de la potencia del DPCCH en una portadora de anclaje, o primera.
Abstract:
A method for wireless communications is provided. The method includes applying independent power controls to two or more carriers from a set of high speed packet access signals. The method includes monitoring power across the two or more carriers to determine power levels for the set of high speed packet access signals. The method also includes automatically adjusting at least one of the independent power controls in view of the determined power levels for the set of high speed packet access signals.
Abstract:
Techniques for reporting acknowledgement (ACK) information and channel quality indication (CQI) information in a wireless communication system are described. A user equipment (UE) may be able to receive data from up to two cells with dual-cell operation. The UE may determine CQI information for a first cell, determine CQI information for a second cell, and send the CQI information for both cells on a feedback channel with a single channelization code. The UE may process a control channel from each cell and, if control information is received from the cell, may further process a data channel from the cell to receive data sent to the UE. The UE may determine ACK information for each cell based on processing results for the data and control channels from that cell. The UE may send the ACK information for both cells on the feedback channel with the single channelization code.
Abstract:
Techniques for scheduling users for transmission on the uplink in a wireless communication system are described. In one design, a total load for a cell may be determined based on a rise-over-thermal (RoT) measurement. An in-cell load for users served by the cell may be determined based on uplink transmissions received from these users. An outside load due to users in neighbor cells may be determined based on the total load and the in-cell load. A target total load for the cell may be determined based on a target RoT for the cell. An available load for the cell may be determined based on the target total load for the cell and the outside load. Users in the cell may be scheduled for transmission on the uplink based on the available load for the cell.