Nortel Networks Corporation

Research in Motion Corporation

Ericsson Ab

Rockstar Consortium US LP

David Paranchych

Ashvin H Chheda

Geng Wu

Rza Nuriyev

Farid Khafizov

Yiping Wang

Ozcan Ozturk

Azeem Ahmad

Mini Vasudevan

Linda Morales

Yusuke Higashi

Yuqiang Tang

Anit Lohtia

The present invention supports a scheduling protocol on a wireless communication network to transmit data packets stored in a queue from a user. Two performance metrics are generated and summed to provide a priority. The performance metrics are based on the delay for the data packets stored in the queue and the rate that the data packets can be transmitted on the network. The user with the higher calculated priority for the current time slot has its data packets transmitted.

Optimized scheduling method for delay-sensitive traffic on high speed shared packet data channels

A method, scheduler, and processor program product for scheduling transmission of packets from a base station to a mobile station. A data rate control index is received from a mobile station. A transmission format is selected using the received data rate control index. The selected transmission format uses a payload size that is smaller than a largest compatible payload size for another transmission format corresponding to the received data rate control index and that is smaller than a total size of packets waiting to be transmitted.

Transmission format selection for optimizing transmission of delay sensitive traffic

A method, apparatus, and computer-readable medium encoded with computer-executable instructions for transmitting delay sensitive packets. A data rate control index is received from a mobile station for use in transmitting the delay sensitive packets to the mobile station. A transmission format is selected using the received data rate control index to form a selected transmission format. The selected transmission format uses a payload size that is smaller than a largest compatible payload size for another transmission format corresponding to the data rate control index and is selected to reduce transmission time of the packets. The delay sensitive packets are transmitted to the mobile station using the selected transmission format.

A wireless communications network includes a first base station system that performs wireless communications according to a first protocol (e.g., 1xEV-DO protocol) and a second base station system that performs wireless communications according to a second, different protocol (e.g., IS-2000). A link is provided between the first and second base station systems to enable a network-initiated handoff procedure. If a source base station system detects that a handoff of a mobile station to a target base station system is required, the source base station system exchanges messaging over the link with the target base station system to perform the handoff. In one example, the handoff is a hard handoff.

Method and apparatus to control handoff between different wireless systems

A method, apparatus, and computer usable program code for creating a pseudo user from a plurality of users. Packets from the buffers are combined for the plurality of users into a buffer for the pseudo user. A multi-user packet is formed using packets from the pseudo user buffer, wherein the packets have older expiration times as compared to expiration times of other packets in the pseudo user buffer. The multi-user packet is transmitted to the mobile station.

Multi-user scheduling for optimizing transmission of delay sensitive traffic

A method for operating a base station to service data communications in a cell/sector of a digital cellular wireless system. Data user forward link transmit power within the cell/sector is allocated. A data user Fundamental Channel (FCH) forward link transmit power reserve level upper limit (f) and a data user FCH forward link transmit power reserve lower limit (f) are set. A data user FCH forward link transmit power reserve level (f) is initialized. The base station is operated to allocate FCHs to data users within the cell/sector, deallocate FCHs to data users within the cell/sector, allocate SCHs to data users within the cell/sector, and to deallocate SCHs to data users within the cell/sector. The SCHs are allocated so that the data user FCH forward link transmit power reserve level is maintained. Based upon at least one current data user operating condition in the cell/sector fis adjusted. Operation prevents ffrom violating for f.

Automatic adaptation of fundamental channel reserved power threshold

A method and system applicable within a mobile transmission system for adaptively allocating a downlink data rate to an access terminal to compensate for channel fading. In accordance with the method of the present invention a downlink data rate is selected in accordance with a determined signal-to-noise level and an effective throughput, wherein the downlink data rate is associated with a specified signal-to-noise threshold to achieve a specified packet error rate. Next, a packet is transmitted to an access terminal at the selected downlink data rate. In response to successfully decoding the packet at the access terminal, the signal-to-noise threshold specified for the selected downlink data rate is decreased such that subsequent data rate selections are adaptively maximized. Responsive to a packet decoding error, the signal-to-noise threshold is abruptly increased to maintain the specified packet error rate.

Adaptive data rate control for mobile data transfer for high throughput and guaranteed error rate

A method and system applicable within a mobile transmission system for adaptively allocating a downlink data rate to an access terminal to compensate for channel fading. In accordance with the method of the present invention a downlink data rate selected in accordance with a determined signal-to-noise level, wherein the downlink data rate is associated with a specified signal-to-noise threshold to achieve a specified packet error rate. Next, a packet is transmitted to an access terminal at the selected downlink data rate. In response to successfully decoding the packet at the access terminal, the signal-to-noise threshold specified for the selected downlink data rate is decreased such that subsequent data rate selections are adaptively maximized. Responsive to a packet decoding error, the signal-to-noise threshold is abruptly increased to maintain the specified packet error rate.

Adaptive data rate control for mobile data transfer

A wireless communications network includes a mobile station and wireless access equipment. In communications between the wireless access equipment and the mobile station (such as in the forward link), a data rate is specified. However, the effective data rate can be reduced (with respect to the specified data rate) if it is determined that the specified data rate is not needed. In one arrangement, the effective data rate is reduced by waiting to fill a physical layer packet before transmission.

Controlling the rate of data transfer over a wireless link

An access network controller and a base station controller are formed to define an interface there between that enables the two systems to facilitate and respond to a voice call that is to be set up to a hybrid mobile station even though the hybrid mobile station is presently engaged in a data only call. More specifically, the base station is formed to generate a pseudo-page signal to the access network controller to determine whether the hybrid mobile station is present and available prior to the base station generating paging signals to establish the voice call. According to the response received from the access network controller, the base station either pages the hybrid mobile station to establish the voice call, forwards the call to voice mail, or forwards the call either to an Internet Call Delivery Server or to an Internet Call-Waiting Server.

Method and apparatus for a hybrid mobile terminal

A mobile communications system includes base stations and mobile units. A power control scheme is provided in which a mobile unit can enter into a discontinuous transmission (DTX) mode. During DTX mode, the mobile unit is not transmitting traffic channels that can be monitored to determine frame errors so that the target ratio of energy per bit to noise spectral density (target Eb/No) can be adjusted. Instead, the base station monitors bit errors of bits in a pilot channel communicated by the mobile unit during DTX mode. Using this technique, the target Eb/No can be adjusted even when the mobile unit is not transmitting traffic channels, so that outer-loop power control can be performed. A number of mechanisms can also be used to detect when a mobile unit has entered DTX mode.

Performing power control in a mobile communications system

A method and apparatus for the transmission of short data bursts in CDMA/HDR networks. Dormant access terminals are assigned to a common traffic channel and rate group by an access point. The access point then informs the access terminals of the assigned common traffic channels and rate groups. The access point then transmits short data bursts to the dormant access terminals using the assigned common traffic channels and rate groups. If an access terminal fails to acknowledge receipt of a short data burst, then the access terminal is re-assigned to a new common traffic channel and rate group and transmission of the short data bursts is re-attempted. If an access terminal fails to acknowledge receipt of a short data burst more than a predetermined number of times, then the access terminal is placed in an active mode of operation. The transmission of short data bursts may be further assigned to time slots within the common traffic channels and rate groups in order to conserve the resources of the access terminals.

Method and apparatus for the transmission of short data bursts in CDMA/HDR networks

A method and apparatus for scheduling forward data link transmissions in CDMA/HDR networks. An access point that services a plurality of access terminals using corresponding forward communication links calculates a scheduling parameter for each of the corresponding forward communications links and access terminals as a function of a plurality of operating parameters.

Method and apparatus for scheduling forward link data transmissions in CDMA/HDR networks

A method for optimizing power management in the transmittal of a variable rate data transfer between two wireless stations, such as a Base Station Transceiver and a Mobile Station. This is achieved by determining the initial power and the initial signal-to-noise values based on the reliability of the transmission, the desired data transfer rate, the power required to transmit a fixed rate message, and the frame error rates. By the use of this invention, the capacity of a desired system and/or quality of a service provided by a desired system may be enhanced.

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Richardson, TX, United States of America

David Paranchych