Abstract:
PROBLEM TO BE SOLVED: To provide techniques for assigning resources for spurts of traffic in a wireless communication system.SOLUTION: A system may support semi-persistent and non-persistent resource assignments. The semi-persistent resource assignment is valid for as long as more data is sent within a predetermined time period of last sent data and expires if no data is sent within the predetermined time period. The non-persistent resource assignment is valid for a predetermined duration or a specific transmission. The semi-persistent resource assignment may be granted for an expected spurt of data to be sent via the communication link. For Voice-over-Internet Protocol (VoIP), the semi-persistent resource assignment may be granted for a voice frame in anticipation of a spurt of voice activity, and the non-persistent resource assignment may be granted for a silence descriptor (SID) frame during a period of silence.
Abstract:
PROBLEM TO BE SOLVED: To facilitate power savings of wireless user equipment (UE) device such as a data packet capable cellphone.SOLUTION: Power consumption is reduced by varying discontinuous communication of reception on a downlink channel or transmission on an uplink channel of user equipment 12 with a base node 14. A changed interval is specified on a downlink channel for discontinuous communication scheduling for the user equipment 12; uplink channel resources are scheduled in accordance with the changed interval; and participation in communication with the user equipment 12 is carried out following the changed interval at a nominal interval automatically reverted to by the user equipment 12.
Abstract:
PROBLEM TO BE SOLVED: To provide systems and methodologies that facilitate operating an access terminal in LTE based wireless communication utilizing extended microsleep.SOLUTION: While in non-DRX mode, an access terminal operates in an ON state for a first period of time and in an extended microsleep state for a second period of time. Further, the first and second periods of time form a repeating pattern where these periods of time alternate. Thus, the access terminal turns on its receiver (RX) for the first period of time (e.g., decodes downlink information while in the ON state) and turns off its receiver (RX) for the second period of time (e.g., inhibits decoding of downlink information while in the extended microsleep state). Further, the first period of time in the repeating pattern can be one TTI (e.g., 1 ms), and the second period of time in the repeating pattern can be a plurality of TTIs (e.g., 5 ms).
Abstract:
PROBLEM TO BE SOLVED: To provide a method for inter-cell interference coordination (ICIC) by a home evolved NodeB (HeNB).SOLUTION: A portion of bandwidth (resources) is reserved for user equipment (UE) (404). Notification of the reserved portion of bandwidth is sent to at least one potentially interfering evolved NodeB (eNB) (406). A data exchange is performed with the UE using the reserved portion of bandwidth (408). Notification about releasing the reserved portion of bandwidth is sent to the potentially interfering eNB (412). In a different embodiment, a transmit power is reduced with a first slew rate (that is, gradually) and is increased with a second slew rate. In another embodiment, a prepared measurement report including a received signal strength measured (for the HeNB) is sent to a first eNB by the UE.
Abstract:
PROBLEM TO BE SOLVED: To efficiently transmit a random access preamble and signaling.SOLUTION: Random access signaling may be sent based on at least one transmission parameter having different values for different user equipment (UE) classes. At least one parameter value may be determined based on a particular UE class, and the random access signaling may be sent based on the determined parameter value(s). The random access signaling may be a random access preamble, and the at least one transmission parameter may include a target SNR, a backoff time, and/or a power ramp. The random access preamble may then be sent based on a target SNR value, a power ramp value, and/or a backoff time value for the particular UE class.
Abstract:
PROBLEM TO BE SOLVED: To perform channel estimation for wireless communication.SOLUTION: Techniques for deriving channel estimates with different channel estimation filters are described. In one scheme, a filter selection metric is determined for a signal to be recovered, a channel estimation filter is selected based on the filter selection metric, and a channel estimate is derived with the selected channel estimation filter. In another scheme, a first channel estimate is derived with a first channel estimation filter having a first filter response, a first signal is recovered with the first channel estimate, and interference due to the first signal is estimated and removed. A second channel estimate is derived with a second channel estimation filter having a second filter response that is different from the first filter response.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques for accessing a wireless communication system.SOLUTION: User equipment (UE) sends a random access preamble including a random identifier (ID), a channel quality indicator (CQI), etc. The UE randomly selects the random ID, or this random ID is assigned to the UE. The UE receives a random access response from a base station. The random access response includes control channel resources (CQI and PC resources), uplink resources, and control information (timing advance and PC correction) for the UE. The random access response is sent in two parts using two messages. A first message may include identification information and other information on a control channel. A second message may be sent on a shared data channel and may include remaining information for the random access response.