Future Wei Technologies, Inc.

Blackberry Corporation

Research in Motion Corporation

Apple Inc.

Huawei Technologies Co., Limited

Rockstar Bidco, LP

Israfil Bahceci

Peiying Zhu

Hang Zhang

Wen Tong

Derek Yu

Aaron Callard

Jia Ming

Mo-Han Fong

Ming Jia

Nimal Gamini Senarath

Gamini Senarath

David G Steer

Sheng Sun

James Mark Naden

Nimal Senerath

Nimal Gamini Senarth

A user equipment (UE) may compute uplink power control levels as a function of a downlink signal to noise ratio (SNIR). For example, the UE may determine an uplink transmit power level by summing a full power control (FPC) transmit power level, a product of a first adjustment factor (&#x3b2;) and the downlink SNIR, and a negative of a second adjustment factor (&#x394;2) when the product of the first adjustment factor (&#x3b2;) and the downlink SNIR is greater than or equal to the second adjustment factor (&#x394;2). A UE may also compute an uplink power control level as a function of target and/or current interference levels associated with neighboring base stations. A UE may also iteratively reduce a transmit power level until an interference level experienced by a neighboring base station has fallen below a threshold.

System and method for power control

In methods of operating a relay station in a multi-hop wireless relay network, the relay station in communication with a superordinate station and a subordinate station, a downlink transmission to/from the superordinate station is transmitted/received at a first frequency. An uplink transmission to/from the subordinate station is transmitted/received at a second frequency. Communications between the relay station and the superordinate station may be scheduled using frames, each frame including a downlink portion at the first frequency, and an uplink portion at the second frequency. The downlink portion includes first and second downlink subframes for communication between the superordinate station and first and second pluralities of stations, respectively. The uplink portion includes first and second uplink subframes for communication between the superordinate station and the first and second pluralities of stations, respectively. The downlink transmission occurs in the first downlink subframe, and the uplink transmission occurs in the first uplink subframe.

Frequency division duplexing and half duplex frequency division duplexing in multihop relay networks

A wireless network includes a base station and a relay station for extending wireless coverage of the base station. Downlink data is sent by the base station and relayed through the relay station to a mobile station, where the downlink data is associated with a preamble that is sent directly from the base station to the mobile station. A transmit power of the relay station is adjusted for transmitting the downlink data from the relay station to the mobile station to reduce a difference between a first power level of the preamble received at the mobile station and a second power level of the downlink data received at the mobile station. The uplink transmit power of the mobile station for the data sent to the relay station is adjusted to compensate for the difference in path loss from mobile station to base station and mobile station to relay station and to compensate for the difference in noise_plus_interference level at relay station compared to that of the base station.

Power control at a relay station in a wireless network

A method of operating base station includes determining a first transmit power of a user equipment (UE), which includes determining a serving base station receive power, determining a path loss of the UE to the base station, determining a downlink signal to noise and interference ratio (SNIR) at the UE, and forming the first UE transmit power. Forming the first UE transmit power comprises summing the serving base station receive power, the path loss of the UE to the base station and the downlink SNIR. The method further includes instructing the UE to transmit at the first UE transmit power.

In accordance with an embodiment, a method of operating a base station configured to communicate with a relay station includes allocating resources to the relay station. Allocating resources includes receiving feedback data from the relay station and scheduling resources to the relay station based on feedback data. Feedback data includes a total buffer size of the relay station and a number of user devices.

System and method for scheduling in a multi-hop environment

A wireless network includes a relay station (RS) for extending wireless coverage of a base station. Data is sent by the base station and relayed through the RS to a mobile station (MS), where the data is associated with a preamble that is sent directly from the base station to the MS. A transmit power of the RS is adjusted for transmitting the data from the RS to the MS to reduce a difference between a first power level of the preamble received at the MS and a second power level of the data received at the MS. The uplink transmit power of the MS for the data sent to the RS is adjusted to compensate for the difference in path loss from MS to base station and MS to RS and to compensate for the difference in noise_plus_interference level at RS compared to that of the base station.

A method selects a path for forwarding a data packet in a wireless communication system. A system capacity versus delay impact curve is calculated for a direct path to mobile station. The direct path has a capacity cost based on communication quality of a direct link between a base station and the mobile station. This curve is shifted by a predetermined time corresponding to an additional delay over a relay path to produce a projected capacity curve for the relay path having a second capacity cost determined according to a combined measure of signal quality of multiple links in the relay path. The second capacity cost is multiplied by a capacity cost ratio to produce a relay capacity curve. The direct path or the relay path is selected based on a comparison of the system capacity versus delay impact curve and the relay capacity curve according to a QoS requirement.

Path selection for a wireless system with relays

A relay station is provided for use in a wireless communication system. The wireless communication system includes a plurality of base stations communicatively coupled to a backhaul network and at least one mobile station. The relay station is shared by at least a first base station and a second base station. The relay station includes a transceiver, a controller and relay circuitry. The transceiver transmits signals to and receives signals both base stations and a mobile station. Signals transmitted to the base stations include a single preamble, MAP and FCH. The controller is electrically connected to the transceiver and is operable to measure a signal quality of the mobile station while connected to the first base station. The relay circuitry is electrically connected to the controller and is operable to conduct a phased handoff from the first base station to the second base station based on the signal quality.

System and method for wireless relay frame structure, protocol, and operation

A method dynamically changes a relay zone offset in a wireless communication system. The wireless communication system includes a base station, at least one relay station, and at least one mobile station. Each relay station is located a hop distance from the base station. A notification of a change in relay zone offset is transmitted to a relay station. Implementation of the change in relay zone offset is delayed for a predetermined amount of frames. Relay zone information is transmitted using the changed relay zone offset.

Dynamic zoning changes in multi-hop relaying systems

In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling a first user device in a first slot, scheduling the first user device for at least one further slot, and transmitting an assignment for the at least one further slot to the first user device. The first slot has a first resource block (RB) and a first transmission time interval (TTI) and the at least one further slot has the first RB and a second TTI.

System and method for scheduling users on a wireless network

A system and method for uplink inter cell interference coordination and multi-user multiple input, multiple output in a wireless access system are provided. A method for providing uplink inter cell interference coordination in a wireless access system includes categorizing users the wireless access system, selecting a resource allocation plan based on the categorized users, allocating resources to the users in the wireless access system based on the selected resource allocation plan, and receiving transmissions from the users.

System and method for uplink inter cell interference coordination in a wireless access system

In accordance with an embodiment, a method of operating a base station configured to operate with user devices includes scheduling transmission for the user devices. Scheduling transmission includes determining a first fading metric for at least one user device from the at least one user device to the base station, determining at a second fading metric for the at least one user device from the at least one user device to at least one other base station, and determining a priority metric for the at least one user device based on the first and second fading metrics. The priority metric is configured to assign a higher priority to a user device with a first fading metric indicating an up-fade and the second fading metric indicating a down-fade. The method further includes transmitting a transmission schedule to the at least one user device based the priority metric.

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Nepean, Canada

Israfil Bahceci