Abstract:
A method, apparatus, processing system, and computer program product enable association of mis-aligned subframes (802) (804) from a first and second downlink (1114) with one another, such that a HARQ acknowledgment message (1116) including jointly encoded feedback for the respective subframes can be correctly interpreted by the corresponding cells. Here, an RNC (1108) may provide an RRC message (1110) to the UE (1102) to associate particular subframes with one another. Further, the RNC (1108) may provide NBAP messages (1112) to the cells (1104) (1106) transmitting the downlink signals, so that the cells can associate the HARQ acknowledgment message (1116) with the appropriate subframe. Still further, additional signaling provides for changing the set of associated subframes when needed due to a drift in the timing offset between cells.
Abstract:
An apparatus and method for controlling idle mode radio measurements comprising: determining if a radio measurement is less than a radio threshold; determining a time duration in which the radio measurement is less than the radio threshold; determining if the time duration is greater than a time measurement threshold; and obtaining at least one other radio measurement from at least one base station which is not a serving cell.
Abstract:
Provide for mobility in a Multi - Point HSDPA network capable of downlink aggregation. Some aspects of the disclosure provide modified mobility events utilized for altering (adding/removing secondary cells at/from) the Active Set for a UE (610). Here, the addition of a cell to the Active Set can coincide with making that cell a secondary serving cell (616) when an event 1A happens. Further, the deletion of a secondary serving cell (616) from the Active Set can coincide with switching off the Multi - Point HSDPA mode when an event IB happens. Still further, a modified mobility event for an HSDPA serving cell change can be utilized to swap a primary serving cell (614) and a secondary serving cell (616).
Abstract:
A method and apparatus for wireless communication may provide a multi-link RLC sublayer in an RNC (802) capable of allocating RLC PDUs among a plurality of MAC entities (804, 806) for use in a Multi-Point HSDPA network. Some aspects of the disclosure address issues relating to out-of-order delivery of the RLC PDUs to a UE (808), such as unnecessary retransmissions. That is, the disclosed multi-link RLC (802) may be capable of distinguishing between sequence number gaps that are caused by physical layer transmission failures and those caused merely by skew.
Abstract:
In a communication system, user equipment (UE) conditionally performs uplink transmit diversity (ULTD) either by Switched Antenna Transmit Diversity (SATD) or Beamforming Transmit Diversity (BFTD) using a first antenna and a second antenna. Either a serving node or the UE determines that uplink transmit diversity is conditionally authorized. Either a serving node or the UE measures a value. The UE transmits using ULTD in response to determining that an enabling condition based on the value is satisfied. The UE can also disable uplink transmit diversity in response to determining that a disabling condition based on the value is satisfied. The disabling condition comprises a disabling threshold that equals the enabling condition comprising an enabling threshold with a threshold adjustment for hysteresis.
Abstract:
A method for load control in uplink interference cancellation systems with soft decision is disclosed. It is determined whether interference is to be cancelled from a received signal based on a packet size of the received signal. If the signal is to be cancelled, a maximal correlation factor between an interfering portion and a useful portion of the received signal is determined based on a transport block size of the received signal. If the signal is to be cancelled, a reduced target load for a base station is also determined based on the maximal correlation factor. If the signal is to be cancelled, uplink transmit power for one or more wireless communication devices is adjusted based on the reduced target load.
Abstract:
A system and method provide single frequency, dual cell high-speed downlink packet access to a UMTS telecommunications system. A first downlink channel is provided from a first sector, and a second downlink channel is provided from a second sector, wherein the first downlink channel and the second downlink channel are in substantially the same carrier frequency. Feedback information such as a CQI and/or a PCI is provided on an uplink channel to facilitate adaptation of the respective downlink channels. Here, the uplink carrier may be in the same or a different carrier frequency than that of the downlink channels.
Abstract:
Systems and methodologies are described that facilitate common data channel resource usage report for receiving additional channel resources in a wireless network. An access point can initially receive a set of channel resources from a network controller for providing wireless network access to one or more devices. The access point can grant and/or deny requests for one or more of the channel resources from a plurality of devices and can feedback information to the network controller regarding the granting/denying. The network controller can determine a load on the access point based at least in part on the feedback information and adjust channel resource allocation based on the load. Thus/ where an access point has granted resources close to capacity to one or more devices, the network controller can provide additional resources to the access point based on received feedback information related to the granted resources.
Abstract:
Systems, methods, devices, and computer program products are described for discontinuous multi-carrier uplink management in a wireless communication system. Common timing parameters may be identified for use in relation to discontinuous uplink transmissions on each of a two or more wireless carriers concurrently transmitting from an access terminal. A first operational state is associated with a first wireless carrier, while a second, different state is associated with a second wireless carrier. The first carrier may be operated in the first operational state concurrently with the second carrier being operated in the second operational state, with each carrier operated in accordance with the common timing parameters.
Abstract:
Systems and methodologies are described that facilitate synthesizing a single baseband waveform from digital signals related to multiple carriers. Digital signals can be received relating to a plurality of carriers. The digital signals can result from spreading data symbols from transport blocks to create chip sequences, which can additionally be pulse shaped. The digital signals can be rotated in a positive or negative direction, such as according to a complex sinusoid or a negative representation thereof. The rotated signals can be combined or added to generate a single baseband waveform. The single baseband waveform can be converted to an analog signal, which can be up- converted and centered at a plurality of frequency carriers, which can be adjacent, assigned for transmitting the signal. In addition, optimizations can be provided to ensure threshold power ratio over the plurality of carriers for effectively transmitting jointly encoded signals.