Abstract:
PROBLEM TO BE SOLVED: To provide a technique to transmit a pilot on a CDMA segment on the reverse link in a wireless communication system.SOLUTION: A terminal is configured to: generate (912) a scrambling sequence on the basis of pilot information for a terminal; generate (914) pilot symbol on the basis of the scrambling sequence; map (916) the pilot symbol to a time frequency block; and send (918) the mapped pilot symbols on the reverse link to one or more sectors in a wireless communication system.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of enabling management of wireless communications in a heterogeneous wireless access point (AP) environment.SOLUTION: System data of an over-the-air message can be configured to include information identifying a distinct type of transmitting base station. In some aspects, the information can include an access type of the base station and/or a sector ID for distinguishing the base station among large numbers of other base stations. According to other aspects, the information can include wireless channel resources designated for a particular type of base station, or blanked by the transmitting base station, to enable interference reduction on such resources. By employing the aspects of wireless communication management, efficient and reliable communication can be affected in large heterogeneous AP networks.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques of allocating and mapping resources in a wireless communication system.SOLUTION: The system uses hop-ports to facilitate allocation of subcarriers. In one aspect, the hop-ports are partitioned into multiple subzones, with each subzone including a configurable number of hop-ports. The hop-ports within each subzone are permuted based on a permutation function. After the permutation, the hop-ports in all subzones are mapped to the subcarriers based on local or global hopping. In another aspect, a set of hop-ports is mapped to a set of subcarriers. A hop-port is mapped to an unavailable subcarrier and then remapped to another available subcarrier. In yet another aspect, a set of hop-ports is mapped to a set of subcarriers distributed across all subcarriers but avoiding subcarriers in a reserved zone.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques for performing adjustments for interference management and delta-based power control in a wireless communication system.SOLUTION: A terminal can utilize one or more delta-based power control techniques upon engaging in a reverse link transmission after a predetermined period of silence or after receiving indications of interference from neighboring access points. A delta value can be computed through open-loop projection, based on which transmission resources such as bandwidth and/or transmit power can be increased or decreased to manage interference caused by the terminal. A delta value, other feedback from the terminal, and/or indications of interference caused by the terminal can also be communicated as feedback to a serving access point to allow the access point to assign transmission resources for the terminal.
Abstract:
PROBLEM TO BE SOLVED: To provide techniques for transmitting pilot and for processing received pilot to obtain channel and interference estimates.SOLUTION: A terminal generates pilot symbols for a first cluster in a time frequency block based on a first sequence, and generates pilot symbols for a second cluster based on a second sequence. The first and second sequences include common elements arranged in different orders and are considered as different versions of a single sequence. The terminal transmits the pilot symbols in their respective clusters. A base station obtains received pilot symbols from multiple clusters in the time frequency block. The base station forms each of multiple basis vectors with multiple versions of the sequence assigned to the terminal and processes the received pilot symbols with the multiple basis vectors to obtain a channel estimate for the terminal.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus which improves quality of communications, power efficiency, etc. to address growing demands in CDMA wireless systems.SOLUTION: In a communication system where a CDMA segment at each access point consists of multiple sub-segments, a three frame transmission time interval (TTI) with eight retransmissions is utilized for data transmission. The access point not only specifies the interlaces to be utilized for data transmission but also assigns packet start interlaces for particular access terminals. An auxiliary pilot channel R-AuxPICH is transmitted by an access terminal along with CDMA data on a reverse link. The ratio of R-AuxPICH to R-PICH is varied based on ACK/NACK feedback. The apparatus sets reverse link activity bits (RABs) as an emergency load-control mechanism for non-QoS flows and includes a transmitter which broadcasts the RABs.
Abstract:
PROBLEM TO BE SOLVED: To provide systems and methodologies that facilitate recovery from an error due to false detection of completion signals at an access terminal.SOLUTION: A request signal specific to an access terminal can be sent to a target base station to initiate handoff or exit a semi-connected state. A completion signal can be transferred in response to the request signal specific to the access terminal. To mitigate errors stemming from false detection of the completion signal at the access terminal, forward link and reverse link confirmation signals can be transferred to confirm successful handoff or connected state re-entry completion. For example, the access terminal can determine handoff or re-entry to be successful when a forward link confirmation signal is detected prior to expiration of a timer. Moreover, the forward link and reverse link confirmation signals can each include a larger number of CRC bits than the number of CRC bits included in the completion signal.
Abstract:
PROBLEM TO BE SOLVED: To enhance performance in a wireless communication system using codebook technology.SOLUTION: The method can include receiving a user preference for a transmission mode, associating the user preference with an entry or entries in a codebook, and assigning the user to a transmission mode corresponding to the entry or entries. The transmission mode can be one of a precoding, space division multiple access (SDMA), SDMA precoding, multiple input multiple output (MIMO), MIMO precoding, MIMO-SDMA and a diversity. Each entry can correspond to a transmission mode.
Abstract:
PROBLEM TO BE SOLVED: To facilitate management of wireless communications in a heterogeneous wireless access point (AP) environment.SOLUTION: System data of an over-the-air message can be configured to include information identifying a distinct type of transmitting base station. In some aspects, the information can include an access type of the base station and/or a sector ID for distinguishing the base station among large numbers of other base stations. According to other aspects, the information can include wireless channel resources designated for a particular type of base station, or blanked by the transmitting base station, to facilitate interference reduction on such resources. By employing aspects of wireless communication management, efficient and reliable communication can be affected in large heterogeneous AP networks.
Abstract:
PROBLEM TO BE SOLVED: To provide a system, an apparatus and a method for scheduling users on a bandwidth smaller than the entire bandwidth, in order to support mobile stations that cannot demodulate the entire bandwidth or that can demodulate a bandwidth smaller than the entire bandwidth.SOLUTION: A processor is configured to: receive a plurality of communications from each of a plurality of wireless access terminals; in response to the communications, make respective related determinations whether the respective related wireless access terminals are simultaneously operable on one or more carriers; on the basis of the determinations, assign at least one carrier to each of the wireless access terminals; and, on each of the plurality of assigned carriers, instruct a plurality of control channel transmissions.