Abstract:
Techniques for efficient data transmission and reception in a wireless communication system are described. In an aspect, a Node B sends transmissions on a shared data channel to a user equipment (UE) based on at least one parameter assigned to the UE prior to the transmissions. The Node B sends no signaling for the transmissions sent to the UE on the shared data channel. The UE processes the transmissions received from the shared data channel based on the assigned parameter(s). In another aspect, a Node B may send transmissions to a UE in time intervals assigned to the UE. In yet another aspect, a Node B may send transmissions to a UE based on assigned or non-assigned parameters. The Node B sends signaling whenever transmissions are sent with non-assigned parameters. The UE may process a transmission based on parameters obtained from received signaling or the assigned parameters.
Abstract:
Methods and apparatus are presented for improving the feedback of channel information to a serving base station, which allows a reduction in the reverse link load while allowing the base station to improve the forward link data throughput. Over a channel quality indicator channel, three subchannels are generated; the re-synch subchannel (600), the differential feedback subchannel(620), and the transition indicator subchannel (630). The information carried on each subchannel can be used separately or together by a base station to selectively update internal registers storing channel conditions. The channel conditions are used to determine transmission formats, power levels, and data rates of forward link transmissions.
Abstract:
Methods and apparatus are presented for dynamically decoding acknowledgment signals. A source receives an acknowledgment signal (410) and starts monitoring an energy value associated with the acknowledgment signal (412). If the energy value exceeds a predetermined threshold amount before the end of the acknowledgment signal, then the source is confident that the portion of the acknowledgment signal received up to that point could be decoded successfully. Hence, the source decodes that portion of the acknowledgment signal (416) and disregards the remainder of the acknowledgment signal.
Abstract:
The velocity of a wireless communications device (106) is estimated. In response to this estimate, a filter bandwidth, such as a pilot filter (310) bandwidth, is adjusted so that the introduction of noise and distortion to a signal received by the device is mitigated. The filter bandwidth is adjusted by increasing it as the estimated velocity increases; and decreasing it as the estimated velocity decreases. Such adjustments may be accomplished through providing a number of predetermined bandwidths that each correspond to a particular velocity range, and setting the filter bandwidth to the predetermined bandwidth that corresponds to the estimated velocity.
Abstract:
Methods and apparatus are presented for dynamically controlling the re-transmission scheme of acknowledgment signals. A source transmits a first data packet over a slot s 1 . If channel conditions are favorable, source transmits a second data packet over slot s 2 , which precedes the reception of any acknowledgment signals. A destination receives first data packet over slot d 1 and second data packet over slot d 2 . Destination decodes first data packet during slots d 2 and d 3 , and second data packet over slots d 3 and d 4 . Destination transmits an acknowledgment signal (ACK1) associated with first data packet during slot d 4 . Rather then transmitting the second ACK1 associated with first data packet over slot d 5 , destination preempts this slot with an acknowledgment signal ACK2, which is associated with second data packet transmitted by source. Hence, destination is configured to overwrite the repetition of a previous acknowledgment in order to transmit a new acknowledgment.
Abstract:
Method and apparatus for providing link quality feedback to a transmitter (32, 34). In one embodiment, a periodic link quality message is transmitted on a gated channel, while continuous differential indicators are transmitted. Between quality messages, the differential indicators track the quality of the link. In one embodiment, a parity check is provided with the quality message. In another embodiment, the frequency of transmission for the quality messages is determined by the channel quality. When the receiver anticipates reception of a transmission, the quality messages are generated; else the quality messages are halted.
Abstract:
Methods and apparatus are presented for acknowledging missed control channel messages. In a system wherein control channel messages can be used to send the transmission parameters of signals on a data traffic channel, the inability to decode the latest control channel message can cause a delay in system throughput. Functionality is added to the acknowledgment channel, which is already in place to acknowledge the receipt of data subpackets on the data traffic channel, so that acknowledgments of missed control channel messages can be conveyed. A pattern or multiplicity of acknowledgment signals can be used to request transmissions of control channel messages (220). An infrastructure element can be configured to read the acknowledgment signals as a request for a broadcast on the control channel (230).
Abstract:
Exemplary embodiments are directed to wireless power. A method may comprise receiving wireless power with a receiver and charging an accumulator with energy from the received wireless power. The method may further include conveying energy from the accumulator to an energy storage device upon a charging level of the accumulator reaching a threshold level.
Abstract:
Embodiments disclosed herein address the need in the art for an extended acknowledgment/rate control channel. In one aspect, an acknowledgment command and a rate control command are combined to form a combined command. In another aspect, the combined command is generated in accordance with a constellation of points, each point corresponding to a pair consisting of a rate control command and an acknowledgment command. In yet another aspect, the points of the constellation are designed to provide the desired probability of error for the respective command pairs. In yet another aspect, a common rate control command is transmitted along with a combined or dedicated rate control command. Various other aspects are also presented. These aspects have the benefit of reduced overhead while providing acknowledgment and rate control to single remote stations and/or groups of remote stations.
Abstract:
Exemplary embodiments are directed to wireless power. A method may comprise receiving wireless power with a receiver and charging an accumulator with energy from the received wireless power. The method may further include conveying energy from the accumulator to an energy storage device upon a charging level of the accumulator reaching a threshold level.