Abstract:
Apparatus and method for power management in a wireless communication network include determining a last packet of data transmitted to a network, sending a state transition indication embedded in the last packet to the network, and adjusting a state of a user equipment (UE) in response to sending the state transition indication embedded in the last packet to the network.
Abstract:
A method of transmitting acknowledgements on certain slots of the R99 uplink DPCCH channel for traffic packets sent on the R99 downlink channel, by replacing the TPC bits by Ack bits transmitted with on-off keying, applying a pre-configured boost to the transmit power of the entire slot in which an Ack has to be transmitted, or to only the Ack symbol in that slot, and not applying any boost to slots not reserved for Ack/Nack transmission or slots in which a Nack has to be sent, modifying the NodeB receiver algorithms to account for the extra power boost once the Ack/Nack detector detects that an Ack has been transmitted in a given slot.
Abstract:
Initiating and operating a high speed dedicated physical control channel, HS-DPCCH, to report a current channel quality indicator, CQI. A user equipment, UE, may receive a high speed sharedcontrol channel, HS-SCCH, order from a Node B triggering a feedback response (i.e. a feedback regarding CQI and/or ACK/NACK on the HS-DPCCH channel). The UE may perform a physical random access channel (PRACH) procedure in response to receiving the order, and may also initiate a collision resolution procedure. The user equipment may transmit a current channel quality indicator (CQI) of the user equipment on a high speed dedicated physical control channel (HS-DPCCH) prior (before, beforehand) to achieving collision resolution (i.e. a result from the collision resolution procedure).
Abstract:
A method and system for improving the reception of uplink transmissions in a heterogeneous wireless communication system includes a high-power node such as a macro-cell and a low-power node such as a femto-cell or pico-cell. To address an uplink imbalance where a nearby low-power node power controls a UE such that uplink transmissions of an HSDPA control channel are poorly received at the serving cell, an RNC can instruct the UE to boost its uplink transmit power, remove the UE from soft handover, or disable power control of the UE by the low-power node. To address inter-cell interference, the RNC can limit the UE transmit power and/or enable the victim cell to suppress the interference. Further, a common control channel can be used to power control UEs outside of the convention set of UEs available for power control.
Abstract:
Wireless user equipment (UE) operating in a wireless communication system may operate in a state, for example, the CELL_FACH state in UMTS, that does not allow for soft handoff from one cell to another. This inability to engage in soft handover may lead to intercell interference at a non-serving cell when the UE transmits on its uplink in close proximity to the non-serving cell. Therefore, provided in the present disclosure is method of wireless communication, which includes receiving a neighbor cell identification set indicating one or more neighbor cells, receiving a relative grant channel resource index corresponding to a relative grant channel shared by at least one of the one or more neighbor cells, detecting intercell interference associated with a user equipment (UE) in the one or more neighbor cells, and transmitting a non-serving relative grant message to the UE on the relative grant channel.
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:
Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In some particular aspects, scheduling of the uplink MIMO transmissions may make a determination between single stream, rank=1 transmissions and dual stream, rank=2 transmissions based on various factors. Further, when switching between single and dual stream transmissions in the presence of HARQ retransmissions of failed packets, the scheduling function may determine to transmit the HARQ retransmissions on a single stream transmission or to transmit the HARQ retransmissions on one stream while transmitting new packets on the other stream.
Abstract:
A method, apparatus, computer program product, and processing system provide for dynamic selection of a secondary serving cell among various available secondary serving cells, be they in the same frequency as the primary serving cell (704) (as in SFDC-HSDPA), in a different frequency but in the same band as the primary serving cell (704) (as in DC-HSDPA), or in a different band from the primary serving cell (704) (as in DB-DC-HSDPA). Here, the UE (310) may be preconfigured for each of the available secondary serving cells, and may receive a configuration message to select between one of them based on factors such UE battery consumption, CQIs corresponding to the available secondary serving cells, loading of the secondary serving cells, or UE power headroom limitations. Thus, an advanced UE (310) capable of receiving the plurality of technologies may benefit from dynamically selecting the best available secondary serving cell in accordance with the factors.
Abstract:
Techniques for signaling acknowledgment status (e.g., ACK, NACK, or DTX) for up to four detected carriers according to 4C-HSDPA. In an exemplary embodiment, an ACK slot of an HS-DPCCH channel utilizes spreading factor 128 to accommodate two 10-symbol codewords per slot. The codewords may be dual-carrier codewords, enabling the acknowledgment status of up to four carriers to be signaled in each slot. A DTX-DTX codeword may be further provided to signal no detection of two carriers assigned to the same codeword. In an alternative exemplary embodiment, a codeword signaling acknowledgment status for two carriers may be repeated twice over a single slot.