Abstract: For quasi-orthogonal multiplexing in an OFDMA system, multiple (M) sets of traffic channels are defined for each base station. The traffic channels in each set are orthogonal to one another and may be pseudo-random with respect to the traffic channels in each of the other sets. The minimum number of sets of traffic channels (L) is used to support a given number of (U) terminals selected for data transmission, where M?L?1 and U?1. Each terminal transmits data and pilot symbols on its traffic channel. A base station receives data transmissions from all terminals and may perform receiver spatial processing on received symbols with spatial filter matrices to obtain detected data symbols. The spatial filter matrix for each subband may be derived based on channel response estimates for all terminals transmitting on that subband.

Abstract: A method and apparatus for transmitting and receiving a SectorParameters message in an Active state is provided. The method comprises transmitting a SectorParameters message over a Forward Traffic Channel Medium Access Control(MAC) in superframe number wherein the superframe number is divisible by NOMPSectorParameters, setting a SectorSignature field of an ExtendedChannelInfo message to the SectorSignature field of a next SectorParameters message, determining if a multi-carrier mode is MultiCarrierOn and transmitting the SectorParameters message on each carrier.

Abstract: Pilots are transmitted on demand on a reverse link and used for channel estimation and data transmission on a forward link. A base station selects at least one terminal for on-demand pilot transmission on the reverse link. Each selected terminal is a candidate for receiving data transmission on the forward link. The base station assigns each selected terminal with a time-frequency allocation, which may be for a wideband pilot, a narrowband pilot, or some other type of pilot. The base station receives and processes on-demand pilot transmission from each selected terminal and derives a channel estimate for the terminal based on the received pilot transmission. The base station may schedule terminals for data transmission on the forward link based on the channel estimates for all selected terminals. The base station may also process data (e.g., perform beamforming or eigensteering) for transmission to each scheduled terminal based on its channel estimate.

Abstract: Techniques for adjusting transmit power to mitigate both intra-sector interference to a serving base station and inter-sector interference to neighbor base stations are described. This may be done by combining interference information from multiple base stations.

Abstract: Techniques for performing power control of multiple channels sent using multiple radio technologies are described. The transmit power of a reference channel, sent using a first radio technology (e.g., CDMA), is adjusted to achieve a target level of performance (e.g., a target erasure rate) for the reference channel. The transmit power of a data channel, sent using a second radio technology (e.g., OFDMA), is adjusted based on the transmit power of the reference channel. In one power control scheme, a reference power spectral density (PSD) level is determined based on the transmit power of the reference channel. A transmit PSD delta for the data channel is adjusted based on interference estimates. A transmit PSD of the data channel is determined based on the reference PSD level and the transmit PSD delta. The transmit power of the data channel is then set to achieve the transmit PSD for the data channel.

Abstract: Techniques for performing power control of multiple channels sent using multiple radio technologies are described. The transmit power of a reference channel, sent using a first radio technology (e.g., CDMA), is adjusted to achieve a target level of performance (e.g., a target erasure rate) for the reference channel. The transmit power of a data channel, sent using a second radio technology (e.g., OFDMA), is adjusted based on the transmit power of the reference channel. In one power control scheme, a reference power spectral density (PSD) level is determined based on the transmit power of the reference channel. A transmit PSD delta for the data channel is adjusted based on interference estimates. A transmit PSD of the data channel is determined based on the reference PSD level and the transmit PSD delta. The transmit power of the data channel is then set to achieve the transmit PSD for the data channel.

Abstract: Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.

Abstract: Techniques for utilizing a capacity-based effective signal-to-noise ratio (SNR) to improve wireless communication are described herein. In an embodiment, a mobile terminal can determine the effective SNR from a forward link channel using pilot/data symbols. The mobile terminal can convey the effective SNR to a base station. In order to minimize transmission overhead, the mobile terminal can quantize the effective SNR prior to transmitting it to the base station. In another embodiment, the base station can determine the effective SNR from a reverse link. The base station can utilize the effective SNR to facilitate scheduling transmissions from the mobile terminal, transmitting power control commands to the mobile terminal, and determining a supporting data rate for the mobile terminal, for example. Suitable SNRs include constrained, unconstrained, average, and/or approximated effective SNRs. In addition, various filters, such as an averaging filter, can be utilized to further process the effective SNR.

Abstract: A closed-loop reverse-link power control algorithm for a frequency hopping orthogonal frequency division multiple access (FH-OFDMA) system is described. The power control algorithm adjusts the user's transmit power based on effective carrier-to-interference (C/I) and Received-Power-Over-Thermal (RpOT) measurements. The algorithm is inherently stable and is effective for FH-OFDMA systems with retransmissions.

Abstract: A method and apparatus for transmitting and processing a QuickChannelInfo block is described. It is determined if a superframe is with odd superframe index. A QuickChannelInfo block is transmitted in every superframe with an odd superframe index. The contents of the QuickChannelInfo block are changed in accordance with the QuickChannelInfo Validity field of the QuickChannelInfo block. It is determined if multi-carrier mode is MultiCarrierOn. The QuickChannelInfo block is transmitted on each carrier. The QuickChannelInfo block is transmitted over the communication. The QuickChannelInfo block is processed after the QuickChannelInfo block is received over a communication link.

Abstract: A closed-loop reverse-link power control algorithm for a frequency hopping orthogonal frequency division multiple access (FH-OFDMA) system is described. The power control algorithm adjusts the user's transmit power based on effective carrier-to-interference (C/I) and Received-Power-Over-Thermal (RpOT) measurements. The algorithm is inherently stable and is effective for FH-OFDMA systems with retransmissions.

Abstract: A method and apparatus for transmitting and receiving an ExtendedChannelInfo message. The method comprises broadcasting the ExtendedChannelInfo message over a Forward Traffic Channel Medium Access Control (MAC); transmitting the ExtendedChannelInfo message in superframes, wherein the superframe number is divisible by NOMPExtendedChannelInfo; delivering the ExtendedChannelInfo message in one superframe or in a set of consecutive superframes; and determining if the transmission of the ExtendedChannelInfo message begins in superframe n and spans k superframe. The ExtendedChannelInfo message is transmitted and received over a communication link.

Abstract: Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The pattern allows for improved receipt of the pilot symbols transmitted. In addition, schemes for improving the ability to multiplex pilot symbols without interference and/or biasing from different mobile stations over the same frequencies and in the same time slots.

Abstract: A method and apparatus for processing in Read SystemInfo state in a wireless communication network, the method comprising issuing a ControlChannelMAC.Activate command, issuing a OverheadMessages.Activate command and determining if a SystemInfoBlock is received within TISPSyncAcq seconds.

Abstract: A method and apparatus for transmitting a SystemInfo block in an Active state in a wireless communication system is described. The SystemInfo block is transmitted every NpBCH0—Period superframe. The SystemInfo block is carried over a primary broadcast channel (pBCH0) physical channel by a control channel medium access control (MAC) protocol. The SystemInfo block is prevented from passing through a signaling transport.

Abstract: To receive packets with interference cancellation, block transmissions for the packets are received on time-frequency blocks used by these packets. Receiver spatial processing is performed on input symbols to obtain detected symbols. Each packet is demodulated and decoded based on all detected symbols obtained for all block transmissions received for the packet. For each packet that is decoded correctly, the transmission for the packet is terminated, the interference due to the packet is estimated, and the estimated interference is subtracted from the input symbols for all time-frequency blocks used by the packet. Receiver spatial processing is performed on the interference-canceled symbols to obtain new detected symbols for all time-frequency blocks used by all correctly decoded packets. Each packet decoded in error and overlapping at least partially with any correctly decoded packet may be demodulated and decoded based on all detected symbols available for that packet.

Abstract: A method and apparatus for supervising a QuickChannelInfo block, ExtendedChannelInfo message and SectorParameters message in a wireless communication is described. A QuickChannelInfo supervision timer for TOMPECISupervision is set. It is determined if the QuickChannelInfo supervision timer is active. An ExtendedChannelInfo supervision timer is set to TOMPECISupervision and determined if ExtendedChannelInfo supervision timer is active. ASectorParameters supervision timer is set to TOMPSPSupervision and determined if the SectorParameters supervision timer is active.

Abstract: Techniques for performing erasure detection and power control for a transmission without error detection coding are described. For erasure detection, a transmitter transmits codewords via a wireless channel. A receiver computes a metric for each received codeword, compares the computed metric against an erasure threshold, and declares the received codeword to be “erased” or “non-erased”. The receiver dynamically adjusts the transmit power based on whether the codewords met the erasure threshold or not.

Abstract: A method and apparatus for transmitting an AccessParameters group message in a wireless communication system, the method comprising generating the AccessParameters group message comprising a 2 bit AccessCycle Duration field wherein the AccessCycle Duration field determines the duration of the access cycle in units of Control Segment Periods (as defined by the Physical Layer), a 5 bit AccessSequencePartition field wherein the AccessSequencePartition field indicates the partition of the access sequence space to allow the access terminal to signal pilot power and buffer status information with the access sequence, a 4 bit MaxProbesPerSequence field wherein the MaxProbesPerSequence field determines the maximum number of probe sequence that can be part of one access sequence and is set to n+1, a 4 bit ProbeRampUpStepSize field wherein the ProbeRampUpStepSize field determines the power ramp up used for probes within a probe sequence and is set to a value 0.

Abstract: Techniques for controlling transmit power and the amount of overlapping in a quasi-orthogonal system are described. A base station for a sector receives transmissions from terminals in that sector and neighbor sectors and determines performance metrics (e.g., overall throughput) and/or QoS metrics (e.g., minimum data rate) for the terminals in the sector. The base station updates an overlapping factor based on the performance metrics and updates a QoS power control parameter based on the QoS metrics. The overlapping factor indicates the average number of overlapping transmissions sent simultaneously on each time-frequency block usable for data transmission. The QoS power control parameter ensures that the terminals in the sector can achieve minimum QoS requirements. A power control mechanism with multiple loops is used to adjust the transmit power of each terminal. The overlapping factor and QoS power control parameter are updated by two of the loops.