Motorola Mobility LLC

Google Inc.

Fei Tong

Nick W Whinnett

Robert T Love

Weimin Xiao

Frederick W Vook

Timothy J Wilson

Amitabha Ghosh

Fan Wang

Stanley J Benes

Chandrasekar Sankaran

In a 3Generation Partnership Project, 3GPP, communication system a base station comprises a scheduler allocating communication resource of at least one of a Physical Uplink Shared CHannel, PUSCH, and a Physical Downlink Shared CHannel, PDSCH to a User Equipment (UE). The scheduling may either be a dynamic scheduling wherein a resource allocation for a single frame is provided to the UE or a persistent scheduling wherein a resource allocation for a plurality of frames is provided to the UE. A resource allocator assigns resource of a Physical Uplink Control CHannel, PUCCH, to the UE dependent on whether dynamic scheduling or persistent scheduling is performed by the scheduler for the UE. The UE transmits uplink control data on a physical uplink channel which is selected as the PUCCH or the PUSCH in response to whether persistent scheduling is used for the UE. The invention allows e.g. reduced PUCCH loading.

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A method, system and communication network for transmitting information signals via uplink (UL) collaborative SDMA, in a wireless communication system. Base station receiver estimates a channel gain associated with the transmission path(s) of each user and keeps a matrix of normalized covariance, between users. Based on the estimated channel gain and the normalized covariance, ULS utility is able to compute channel capacity. Based on capacity estimates of (1) the multiplexed user signals and (2) the individual user signals, signals are either multiplexed for UL SDMA or are transmitted individually. An optimal selection of multiplexed signals may be based upon: (1) a cross user interface measurement; and (2) a selection mechanism based on eigen-decomposition techniques. The ULS utility enables a UL scheduler to pair information signals with clear spatial distinction and minimal correlation, based on capacity evaluations.

Uplink spatial division multiple access (SDMA) user pairing and scheduling

Use of the physical uplink control channel in a 3rd generation partnership project communication system

The present invention provides a system and method for transmit beamforming in a Frequency Division Duplex communication system. A first step () includes correcting for differences between transceiver receive and transmit responses within a base station. A next step () obtaining a beamforming weight of a phase antenna array on an uplink. A next step () transforming the uplink beamforming weight a downlink beamforming weight by applying a phase correction that is a function of wavelength at the uplink and downlink frequencies and distance between antenna elements.

Frequency transformation based transmit beamforming in a communication system

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Swindon, United Kingdom

Fei Tong