Motorola Corporation

Airvana, Inc.

Airvana Network Solutions, Inc.

Other

General Electric Company

General Electric Capital Corporation

Solid Technologies Inc.

Motorola Mobility LLC

Dae-Young Kim

M Vedat Eyuboglu

Sepehr Mehrabanzad

Sae-Young Chung

John Pilozzi

Pierre A Humblet

Gopal Harikumar

Vladimir G Parizhsky

Jian Yang

William Leslie Brown

Patrick M Maurer

S Arif Ahmed

Jack Liu

Seung Hee Lee

Yong Hoon Kang

Michael Pollman

Firas Abi-Nassif

Jin Hwa Ku

In a cell of a cellular wireless communication system, the SIR of at least one user in a sector of the cell is altered by temporarily reducing transmissions on a forward link in at least one other sector of the cell or a sector in another cell in accordance with a pattern.

Boosting a signal-to-interference ratio of a mobile station

In a cell of a cellular wireless communication system, the SIR of at least one user in a sector of the cell is increased by temporarily reducing transmissions on a forward link in at least one other sector of the cell or a sector in another cell in accordance with a pattern.

Data packets are received at a communications node. Each of the received data packets is associated with one of a set of different service classes. Packets corresponding to the received data packets are transmitted to recipients. The order in which the data packets are transmitted is controlled based on the transmission rate and the service class of the packets.

Communication of digital data over a wireless transmission medium

Techniques for transmitting encoded data packets to one or more mobile stations in a communication system including a cell that has sectors serving at least partially different geographic areas. The techniques include transmitting in a first sector an encoded data packet in one or more time slots to a mobile station; reducing transmission power in a second sector during one or more of the time slots in which the first sector transmits the data packet to the mobile station; decoding at the mobile station the encoded data packet after each time slot; transmitting by the mobile station a signal indicating acknowledgment of the packet reception when the decoding of the packet is successful; and in response to receiving the acknowledgement signal, ceasing transmission of the data packet in the first sector in subsequent time slots.

Capacity enhancement schemes are described for forward and reverse links of distributed cellular base stations consisting of a central unit and one or more remote units. In general, in one aspect, reverse link capacity is shared among remote units. The capacity sharing can be determined dynamically. The forward link capacity can also be enhanced by estimating the location of the mobile stations.

Capacity enhancement schemes for forward and reverse links of distributed cellular base stations

A method and apparatus is provided for controlling the transmit power of an analog modem when the transmit power level does not match the desired transmit power level, thus conforming to FCC regulations on transmit power and/or eliminating non-linearities associated with higher than required power levels and loss of signal-to-noise ratio and concomitant at loss of data rate if the transmit power levels are less than that desired. In one embodiment, the power level at the analog modem is sensed to ascertain if it is not at the desired transmit power level, with adjustment being provided by transmitting the desired change in the transmit power level to the digital modem, whereupon mapping parameters are redefined by adjusting the number of equivalence classes, thus to adjust transmit power at analog modem.

Method and apparatus for the control of modem transmit power

In a full duplex PCM modem system having an analog and digital modem, a method and apparatus is provided for on-the-fly reconfiguring of analog or digital modem transmitter parameters without switching back to a retrain or startup mode. In one embodiment, the transmitter parameters for the analog modem are modified to take into account channel impairments, in which modified precompensation parameters are sent from the digital modem to the analog modem without switching out of the data mode. In another embodiment, transmit power levels sensed at the analog modem which are non-optimal are adjusted by new parameters sent from the digital modem without having to switch back to the startup mode. In a further embodiment, transmitter parameters in the digital modem are reconfigured to provide more an increased downstream data rate from the digital modem upon sensing improvement in the quality of the downstream channel without switching to the startup mode.

Data mode signaling system for PCM modem adaptation

A method and apparatus is provided that dynamically allocates processor resources to data transfer-related operations, minimizing the processor resources used for data transfer-related operations and maximizing the processor resources available for other applications. The apparatus comprises a communication device (), comprising a processing unit () and a complexity controller (), which communication device () is capable of executing multiple data transfer-related operations and is highly configurable. The complexity controller () monitors a condition of a communication channel () and determines the best configuration of communication device () in regard to processor resource utilization to meet a given Quality of Service requirement for the condition of channel () and to maximize the processor resources available for other applications, such as data terminal equipment user applications () or signal processing by other communication devices using the same host processor.

Method and apparatus for dynamically allocating resources in a communication system

In a radio access network, multicast packets are delivered each identified by a multicast network layer address representing a multicast group of access terminals. The multicast packets are delivered in one or more air link frames using a common control channel that is shared among access terminals in a sector. Each airlink frame carries a multicast air link address that identifies the multicast group of terminals.

Broadcasting and multicasting in wireless communication

By controlling reverse rates among mobile stations to reduce reverse-link interference, reverse-link throughput can be increased.

Enhanced reverse-link rate control in wireless communication

Packets are generated for delivery over a forward communication channel from a base station to a remote station, in which a parameter that characterizes the packets being generated is determined adaptively based on factors not limited to the data rate of the channel.

Coding for multi-user communication

Data is sent in some time slots of a forward link from a base station to at least one remote station in a wireless communication system, and voice information is sent from the base station to the at least one remote station in some other time slots of the forward link, the data being sent in a time division multiple access (TDMA) mode, the voice data being sent in a code division multiple access (CDMA) mode.

Multi-user communication of voice and data

A system and method for adjusting the phase of the analog signal produced by an analog modem connected to a digital modem over a telephone network. The digital portion of the telephone network is locked to the network clock, and the modems have no control over the sampling timing or rate as the analog signal is sampled and quantized by a codec. If the analog signal is shifted in phase relative to the network clock, then the codec may be sampling at unresolvable points on the analog signal, thereby causing errors and a decrease in the usable bandwidth for transmitting data. The analog modem symbol frequency is locked to the clock of the digital network using loop-back timing. A phase estimate is computed using the quantized samples of a known reference signal. Next, a &ldquo;phase offset&rdquo; is calculated by comparing the phase estimate to an optimum phase value. Then the digital modem sends the calculated phase offset information to the analog modem. The analog modem then delays its transmitted signal by the phase offset. After the phase of the analog modem's transmitter is adjusted, the analog signal reaches the codec at the phase desired by the digital modem.

System and method for sampling phase adjustment by an analog modem

In order to achieve reliable and efficient communication over public switched telephone networks (PSTN), voice-band modems utilize sophisticated start-up procedures. This invention involves a start-up procedure that allows an analog modem and a digital modem to establish a dial-up connection that utilizes PCM modulation in both upstream and downstream directions for data transmission.

Growing community of inventors

Lexington, MA, United States of America

Dae-Young Kim