British Telecommunications Public Limited Company

Other

Mo Hao

Richard MacKenzie

Yang Yang

Hao Jiang

Jianjun Li

Linglong Dai

Richard Thomas Mackenzie

Arman Shojaeifard

Bichai Wang

Zijian Zhang

Ruochen Su

Wenqian Shen

Jingbo Tan

Xinyu Gao

Kunzan Liu

A reflective surface for directing wireless communications signals that includes a plurality of independently reconfigurable elements disposed irregularly on the surface is disclosed. A method of controlling a communication channel of a wireless communication system that includes the reflective surface having an irregular element arrangement is also disclosed.

RIS-assisted wireless communications

According to the present disclosure there is provided a multiple-input-multiple-output (MIMO) transmitter for transmitting wireless communication signals over a communication channel to a receiver, the transmitter including a digital signal processor configured to perform pre-coding on a plurality Nof data streams; a plurality Nof radio-frequency (RF) chains each configured to pass a pre-coded data stream from the digital signal processor to generate a signal representing that data stream; a lens antenna array comprising an array of Nantenna elements; and a selecting unit coupled between the plurality Nof RF chains and the lens antenna array, the selecting unit including a plurality of separate coupling units each configured to couple a respective RF chain to a selective sub-array of Nantenna elements concurrently for transmitting the signal representing the data stream passed through that RF chain.

MIMO systems

Embodiments of the present disclosure provide a method and apparatus for configuring multi-level cells or cell clusters and a communications system. The method includes: exchanging by a base station with one or more other base stations or cell cluster heads in the same level to obtain first information; receiving, by the base station, second information reported by one or more base stations or cell cluster heads in the lower level; configuring one or more cells in the lower level into a cell cluster by the base station according to the first information and the second information, and determining a cluster head of the cell cluster; and performing information transmission with the cluster head of the cell cluster. Hence, not only interference between equipment in the cell of the upper level and the cell cluster of the lower level but also interference between equipment out of the cell of the upper level and the cell cluster of the lower level are taken into account, thereby further reducing interference of the cells or cell clusters of various levels, and improving reliabilities and expandability of the cells or cell clusters.

Method and apparatus for configuring multi-level cells or cell clusters and communications systems

A method of performing channel estimation in a multiple-input-multiple-output (MIMO) communication system comprising a downlink device and an uplink device arranged to communicate over a communication channel, the method including at the uplink device: analyzing a first channel vector representing channel gains between the downlink device and a first antenna of the uplink device in the angular domain to identify a set of angular domain support points; generating from the set of angular domain support points a value vector; and feeding back from the uplink device to the downlink device an indication of the value vector; and at the downlink device: analyzing a second channel vector representing channel gains between the downlink device and a second antenna of the uplink device; generating a transmit steering matrix; and generating an estimate of the first channel vector.

Channel estimation in MIMO systems

Embodiments of the present disclosure provide a resource allocation method and apparatus for a small cell cluster and a communications system. The resource allocation method includes: exchanging by the base station of the upper level with another base station of the upper level, to obtain information on resources and/or interference of the other base station of the upper level; receiving information by the base station of the upper level at least from the cluster head of the SCC, to obtain information on resources and/or interference of the base station of the upper level; and allocating resources for the small cell cluster by the base station of the upper level based on the obtained information on resources and/or interference of the other base station of the upper level and the information on resources and/or interference of the base station of the upper level. According to the embodiments, interference coordination may be performed efficiently on a small cell cluster at an edge of the base station of the higher lever, so as to lower the interference to the small cell cluster, and the expandability of the network may be improved.

Resource allocation method and apparatus

Embodiments of the present disclosure provide a resource management method and apparatus for a cell cluster and a communications system. The method includes: transmitting resource allocation information by a base station taken as a cluster head of the cell cluster to other base stations in the cell cluster. By transmitting the resource allocation information by the base station taken as the cluster head of the cell cluster to the other base stations in the cell cluster, resource allocation for the cells may be performed efficiently, capabilities of coordinating inter-cell interference may be improved, and as the cell cluster may be expanded to cell clusters of a lower level or more levels, scalability of the network may be improved.

Resource management method

This disclosure provides a method in a wireless telecommunications network, and a wireless telecommunications network node for implementing the method, the network including a transmitter having an overall coverage area and a plurality of User Equipment (UE) within the transmitter's overall coverage area, the method including receiving data indicating a first count of UEs of the plurality of UEs disposed in a first section of the transmitter's overall coverage area and further indicating a second count of UEs of the plurality of UEs disposed in a second section of the transmitter's overall coverage area; comparing the first and second counts to a predetermined threshold; and transmitting a first data beam having a first beam coverage area and a second data beam having a second beam coverage area, wherein a magnitude of the first beam coverage area is based on the comparison of the first count to the predetermined threshold and a magnitude of the second beam coverage area is based on upon the comparison of the second count to the predetermined threshold.

Growing community of inventors

Beijing, China

Mo Hao