Abstract:
Scrambling/OVSF codes are varied with a TD-CDMA slot to overcome jamming effects by a dominant interferer. Interference is detected and a scambling code sequence is varied and employed to multiply a Walsh code assigned to a user device within a transmission time slot.
Abstract:
Systems and methodologies are described that facilitate performing fast cell selection in a user device wherein the user device can select a serving sector from a list of sectors in its virtual active set (VAS), while in communication with a wireless network. The serving sector can be different from a nominal sector whose scrambling code the user device employs for transmission on the uplink, which scrambling code can be known to all sectors listed in the VAS for the user device. In this manner, all sectors in whose coverage area the user device is located can be included in the user device's VAS and can receive and demodulate transmissions there from.
Abstract:
Techniques for recovering transmissions on data and control channels with interference cancellation are described. A receiver derives a first interference estimate for a first channel based on a first channel estimate and cancels the first interference estimate from an input signal. The receiver thereafter derives a second interference estimate for the first channel based on a second channel estimate and cancels the second interference estimate in place of the first interference estimate from the input signal. The receiver may derive the first channel estimate based on pilot symbols and may derive the second channel estimate based on a correctly decoded packet. The second channel estimate may be of higher quality than the first channel estimate.
Abstract:
Methods and apparatus for power management in a wireless communication network include identifying a user equipment (UE) configuration as a stationary extra-long battery device configuration. Further, the methods and apparatus include receiving a measurement threshold adjustment message. Moreover, the methods and apparatus include adjusting an idle mode cell measurement threshold based on the measurement threshold adjustment message.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus begins to transmit a data packet and control information. Upon receiving an Ack of early decoding of the data packet prior to transmission of the entire data packet, the apparatus ceases transmission of the data packet, yet continues to transmit at least a portion of the control information. Transmission of the portion of the control information that is only needed to decode the data packet is ceased. Transmission of the residual portion of the control information ceases once its use ends. A receiving apparatus begins to receive the data packet and control information. After early decoding the packet, the apparatus transmits an Ack of early decoding and powers down a decoding module. Upon receiving a second Ack, the apparatus ceases to monitor the control information.
Abstract:
The present disclosure presents apparatuses and methods of accessing a communication network including obtaining extended access barring (EAB) data at a user equipment (UE), wherein the EAB data comprises an EAB uniform delay parameter, computing a uniform distribution parameter, determining an access bar period, wherein the access bar period is based on at least the EAB uniform delay parameter and the uniform distribution parameter, and initiating an access procedure to access the communication network after waiting at least the access bar period. Additionally, apparatuses and methods associated with a network apparatus controlling access to the communication network are also disclosed.
Abstract:
A method for adjusting a received channel quality indicator is described. A channel quality indicator is received from a wireless communication device. A first transmission time interval for which the channel quality indicator was generated is determined. The received channel quality indicator is adjusted using an outer loop margin. The outer loop margin is dependent on a transmission mode of the first transmission time interval.
Abstract:
An apparatus, method, and computer program product operable to determine a phase of a beamforming weight vector utilizing a memory of a previously used phase for the beamforming weight vector, capable of improving a channel estimate. A base station (320) transmits a beamforming weight vector to a user equipment (310) based on a determined channel estimate. The user equipment (310) selects between the received beamforming weight vector, or a modified beamforming weight vector having its phase shifted by -360, in accordance with a suitable selection criteria. That is, the selection is made such that a difference between the phase of the selected beamforming vector and a phase of a prior beamforming vector is within a predetermined range.
Abstract:
A base station receiver (610), a computer program product operable at a base station (600), and a method operable at a base station receiver (610), for receiving uplink transmit diversity transmissions utilizing a master/ slave scheme at the receiver (610). One or more tracking loops, such as a searcher task, a time tracking loop, or a frequency tracking loop may be implemented at the base station receiver (610) to determine compensation values, such as finger timings for a rake receiver or frequency compensation values, in accordance with characteristics of a primary pilot channel (514) transmitted utilizing a first precoding weight vector. Here, corresponding compensation values may be derived for the reception of a secondary pilot channel (520) transmitted utilizing a precoding weight vector orthogonal to the first precoding weight vector, simply based on those determined for the primary pilot channel (514). That is, the compensation value assignment for receiving the second pilot channel may act as a slave to its master, being the
Abstract:
Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In particular, a single inner loop power control may be utilized to control a power of both a primary stream (610) and a secondary stream (612), in a system where the power of the secondary stream (612) is linked to the power of the primary stream (610). That is, a single transmit power control command calculated according to the primary stream (610) and directly controlling the power of the primary stream (610) can effectively control the power of both uplink streams. Further, the disclosure provides outer loop power control, where a signal-to-interference ratio target used in the inner loop power control can be adjusted. Here, the SIR target may be adjusted in accordance with at least one of a block error rate performance or a HARQ failure performance of one of the primary stream (610) or the secondary stream (612).