Intel Corporation

Other

Apple Inc.

Senjie Zhang

Qinghua Li

Shanshan Zheng

Hongming Zheng

Guangjie Li

Xuebin Yang

Alexei Vladimirovich Davydov

Yuan Zhu

Changlong Xu

Hujun Yin

Hongmei Sun

Jong-Kae J K Fwu

Jinyu Cao

Xintian Eddie Lin

Rath Vannithamby

Xu Zhang

Peng Cheng

Min Huang

Yang-Seok Choi

Yang Gao

Hui Guo

Tin-Fook Ngai

Zhiyuan Zhang

Xiangbin Wu

Xinxin Zhang

Qianying Zhu

Shunyu Zhu

Wu May

Yang Y G Gao

Xu Sunny Zhang

An apparatus for use in a radio aggregation unit (RAU) of a cloud radio access network (Cloud-RAN or C-RAN), the cloud-RAN including a radio cloud center (RCC) and a plurality of radio remote systems (RRS) coupled to the RCC, wherein each RRS comprises an RAU coupled to a plurality of Remote Radio Units (RRUs) is disclosed. The apparatus comprises an input circuit configured to receive a first scheduling result from the RCC and a scheduling circuit configured to generate a second scheduling result for scheduling the one or more UEs in the coverage area of the RAU. Further, the apparatus comprises a processing circuit configured to selectively schedule a select UE from one or more UEs in the coverage area of the RAU, based on the first scheduling result from the RCC or the second scheduling result or an integration of the first scheduling result and the second scheduling result, based on a predetermined threshold associated with a receipt time of the first scheduling result from the RCC at the RAU.

Distributed scheduling method for fronthaul-based C-RAN wireless network architecture

A front-end unit that operates within a C-RAN architecture to perform the functions of cellular signal processing and resource selection between an RRU and the BBU pool network is described. The front-end unit supports flexible load migration and CoMP (coordinated multipoint) in the CRAN BBU while also reducing data transmission within the BBU pool network or between the BBU pool network and the RRU.

C-RAN front-end preprocessing and signaling unit

A MIMO beamforming method comprises receiving at a base station information regarding a difference between an ideal beamforming matrix and an averaged beamforming direction, using the information to construct a beamforming matrix at the base station, and performing a beamforming operation using the reconstructed beamforming matrix. Alternatively, the method comprises computing at a subscriber station an averaged beamforming direction, computing at the subscriber station a quantization index corresponding to a differential matrix in a differential codebook, and transmitting the quantization index across a wireless channel of the wireless network. The differential codebook may be constructed by identifying a codebook center and transforming a predefined codebook that is stored in a memory of a component of the wireless network.

MIMO beamforming method and method of constructing a differential codebook for a wireless network

In one embodiment, a method for data communication may include receiving a first set of soft bit values in a Hybrid Automatic Repeat-Request (HARQ) buffer using a first bit width. The method may also include soft combining the first set of soft bit values with a second set of soft bit values to obtain a set of combined soft bit values. The method may also include transforming the set of combined soft bit values from the first bit width to a decoder input bit width to obtain a set of transformed soft bit values.

Hybrid automatic repeat-request combination for wireless transmissions

Embodiments of an enhanced Node B (eNB) configured for use in a cooperative radio access networks (C-RAN) and method for central baseband unit (BBU) processing are generally described herein. In some embodiments, the eNB may include a baseband unit (BBU) processing pool comprising a plurality of processing units. The BBU processing pool is configured to share the processing load of several sectors. A control unit may monitor the processing load of the processing units and perform dynamic load sharing by migrating the baseband processing between the processing units without changing a carrier used by user equipment operating with a sector.

Cooperative radio access network with centralized base station baseband unit (BBU) processing pool

Wireless transmissions between a base station and a user equipment device may be performed using resource mapping rules. The resource mapping rules may be generated based on resource block descriptions. The resource block descriptions may be determined by matching symbols included in a resource block to a predefined set of symbol types. The symbol types may be determined based on transmission characteristics.

Resource element mapping for wireless transmissions

Techniques for a precoding scheme for wireless communications are described. A method and apparatus may comprise a first device for a communications system to determine a beamforming structure for a closed loop transmit beamforming scheme using channel information, one or more scaling factors and one or more integers to represent a complex vector. The beamforming structure may include a codeword, a codebook and a codeword index. Other embodiments are described and claimed.

Method and apparatus using a base codebook structure for beamforming

A system and method for uplink channel estimation for a software defined radio is disclosed. The method comprises dividing an allocated bandwidth for a received signal on the uplink channel into N segments. The uplink channel estimation is processed for each of the N segments as a separate process. The uplink channel estimation includes pre-processing each of the N segments of the received signal; Wiener filtering the pre-processed segments of the received signal in the frequency domain; and Wiener filtering each of the frequency filtered segments in the time domain to determine a channel estimate for each of the N segments for use in equalizing the received signal.

Uplink channel estimation for a software defined radio

An embodiment of the present invention provides a method, comprising using an adaptive codebook for beamforming for communications in wireless networks.

Techniques utilizing adaptive codebooks for beamforming in wireless networks

Briefly, in accordance with one or more embodiments, data transmitted from a transmitter is received in a downlink channel, and channel quality data is fed back to the transmitter in a first uplink channel or in a second uplink channel. Channel quality data is feedback at a lower rate on the first uplink channel and channel quality data is feedback at a higher rate on the second uplink channel in the event there is a higher amount of data to be fed back. Link adaptation may be utilized to select a transmission rate on the second uplink channel, wherein the transmission rate is selected based at least in part on a channel condition or a user location.

Transmission of channel quality data in wireless communication systems

A PHY abstraction mapping between the link level and system level performance is presented based on mapping between the mean RBIR (Received Bit Information Rate) of the transmitted symbols and their received LLR values after symbol-level ML detection in SISO/MIMO wireless systems, such as WiMAX. In MIMO antenna configuration, the mapping is presented for both vertical and horizontal encoding. An embodiment of this invention provides the PER/BLER prediction in the actual system, enabling the system to use more aggressive methods to improve the system performance.

Link performance abstraction for ML receivers based on RBIR metrics

An embodiment of the present invention provides an apparatus, including a transceiver adapted for use in a wireless network using a fast feedback channel design that incorporates a 2-two level adaptive fast feedback channel framework separating uplink (UL) fast feedback channels into primary and secondary UL fast feedback channels.

Growing community of inventors

Beijing, China

Senjie Zhang