Abstract:
Se proporciona un método para mantener sincronización entre una AT y una estación base durante un periodo inactivo. Durante el periodo inactivo, un número reducido de señales de referencia de enlace ascendente para cálculo de calidad de canales de enlace ascendente son enviadas a la estación base por la AT. Las señales de referencia de enlace ascendente son enviadas para ayudar a una desmodulación coherente y cálculo de calidad de canal de enlace ascendente para programación. Durante el periodo inactivo de enlace ascendente, los números de señales de referencia de enlace ascendente se diseñan para ser reducidos en anchos de banda coherentes selectivos. La selección de los anchos de banda coherentes se alterna en tiempo y cubre el espectro completo para permitir el cálculo de calidad de canal a través del espectro completo.
Abstract:
The present invention provides a method for using uplink reference signals for access grant requests. The method includes determining at the base station that at least one mobile unit is requesting access to at least one uplink channel based on information indicative of a change in a masking sequence applied to at least one reference signal. Another embodiment of the present invention includes providing by a mobile station a first reference signal modulated by a first masking sequence to indicate a request for access to at least one uplink channel.
Abstract:
The present invention provides a method for coordinating control of radio resources for multicast/broadcast services in distributed radio resource management. One exemplary embodiment of the method may include communicating information between a plurality of units having radio resource management responsibilities. The communicated information is related to coordinating at least one multicast/broadcast service provided by 1he plurality of units.
Abstract:
A method is provided for operating a multi-bandwidth OFDMA system that can achieve an enhanced bandwidth efficiency due to windowing without significantly impacting the underlying physical design of the receive filters. The method comprises establishing a bandwidth over which the radio resources transmit signals, the bandwidth being comprised of an edge-band (505) and a center-band (510). Narrow band radio resources (700) are assigned to a portion of the bandwidth that is at least partially within the edge-band (505).
Abstract:
An exemplary method of communicating includes multiplexing control signaling in a physical uplink control channel (PUCCH) onto a physical uplink shared channel (PUSCH) by puncturing PUSCH data with PUCCH control information using a uniform distribution of the PUCCH information within at least one resource block of the PUSCH data. One example includes using a first constant amplitude zero autocorrelation sequence (CAZAC) index on PUCCH for communicating CQI and ACK information together and using a second, different CAZAC sequence index for communicating CQI information alone or with NAK information or DTX. The used index provides an indication of whether ACK information is communicated. The used index also provides implicit DTX detection without additional processing.
Abstract:
A method is provided for maintaining synchronization between an AT and a base station during an idle period. During the idle period, a reduced number of uplink reference signals for uplink channel quality estimation are sent to the base station by the AT. The uplink reference signals are sent to assist coherent demodulation and uplink channel quality estimation for scheduling. During the uplink idle period, the numbers of uplink reference signals are designed to be reduced in selective coherent bandwidths. The selection of the coherent bandwidth alternates in time and covers the entire spectrum to allow the channel quality estimation through the entire spectrum.
Abstract:
A method and an apparatus for scheduling transmissions of a plurality of cells in a wireless communications system including one or more base stations is provided. The method comprises providing a set of virtual channels to enable an intra-cell transmission orthogonal to another transmission within each cell of the plurality of cells and inter-cell transmissions orthogonal to other transmissions across a cluster of cells associated with the one or more base stations. The method further comprises exchanging signaling messages between two or more base stations to coordinate- scheduling of the intra-cell transmission with the inter-cell transmissions for the cluster of cells. For optimizing a parameter associated with scheduling of a plurality of users from a cluster of cells in a wireless communication system, an optimal power level for the parameter of each active user may be searched to maximize an indication of system capacity of the wireless communication system. This enables a coordinated jointly scheduling of the users active in the cluster of cells based on the optimal power levels such that the total interference within the cluster may be minimized to maximize the system throughput/capacity.