Zte (usa) Inc.

Zte Corporation

Sean Cai

Jason Hou

Jing Wang

Hongyun Qu

Mary Chion

Dazi Feng

Huiying Fang

Yunsong Yang

Yonggang Fang

Jerry Chow

Ling Xu

Jun Han

Wenzhong Zhang

Kim Olszewski

Cancan Huang

Fang Huiying

Qu Hongyun

A flexible OFDM/OFDMA frame structure technology for communication systems is disclosed. The OFDM frame structure technology comprises a configurable-length frame which contains a variable length subframe structure to effectively utilize OFDM bandwidth. Furthermore, the frame structure facilitates spectrum sharing between multiple communication systems.

Flexible OFDM/OFDMA frame structure for communication systems

Implementations of systems and techniques for scheduling wireless transmission of data blocks between a base station (BS) and one or more relay stations (RSs) in a wireless relay communication network.

Frame structure for multi-hop relay in wireless communication systems

Wireless communication techniques for cellular deployment of wireless communication systems with transmitters in each cell to have partially overlapped transmission patterns between two adjacent transmitters. Implementations of the described techniques can provide transmit diversity with intentional partial beam pattern overlays to improve cell sectorization or frequency re-use factor, at the same time, reduce intra-cell and inter-cell interference. Various modulations may be used in the described systems, including FDMA, TDMA, and OFDMA modulation schemes.

Techniques for providing efficient transmit diversity and bandwidth segmentation in a wireless communication system

An OFDM/OFDMA frame structure technology for communication systems is disclosed. The OFDM/OFDMA frame structure technology comprises a variable length sub-frame structure with efficiently sized cyclic prefixes and efficient transition gap durations operable to effectively utilize OFDM/OFDMA bandwidth. Furthermore, the frame structure provides compatibility with multiple wireless communication systems. An uplink frame structure and a downlink frame structure are provided.

OFDM/OFDMA frame structure for communication systems

Devices, systems and techniques to monitor signal fading based on a cluster of subcarriers at a receiver and feedback monitored signal fading to a transmitter in wireless communication systems such as OFDM and OFDMA systems.

Subcarrier cluster-based power control in wireless communications

A method for updating a connection relationship of a wireless relay station, comprises the following steps of: (a) a wireless relay station RSalready connecting to a wireless communication network group comprising a base station and wireless relay stations subjected to the base station, and if determining that the connection relationship of RSneeds to be changed, selecting a target node; (b) instructing RSto update the connection to the target node, and after receiving the instructions, RSstarting a connection update, establishing a wireless link to a new node and releasing no longer used resource in an existing data tunnel. The present invention can fulfill the update of the connection relationship of a wireless relay station, and can take steps to further guarantee the service suspension time of the terminals and RSs subjected to the wireless relay station is the shortest.

Update method of wireless relay station link relation

Techniques for bandwidth allocation in communication systems such as OFDM, OFDMA, or SC-FDMA systems to improve spectral efficiency and increase flexibility and adaptability with scalable single or multiple-carrier bandwidth allocation characteristics.

Scalable OFDM and OFDMA bandwidth allocation in communication systems

A station is disclosed that is configured for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The station includes a processor configured to fix a subcarrier spacing to a predetermined value for one or more subframes in all available bandwidths. The station further includes a transmitter configured to transmit a signal having the fixed subcarrier spacing, regardless of a frame structure of the one or more subframes. According to certain embodiments, the predetermined value may be divided evenly by at least one channel raster. The predetermined value may be 12.5 KHz, according to certain embodiments. Alternatively, the predetermined value is 6.25 KHz for one or more low mobility mobile stations, and/or the predetermined value is 25 KHz for one or more high mobility mobile stations. The station may be a mobile station or a base station configured for uplink and downlink transmission.

Signal transmission with fixed subcarrier spacing within OFDMA communication systems

A method for tessellating a subframe using maximal-sized bricks. A brick bandwidth and a brick time duration are computed based on the heights and widths of the bursts in the subframe. Bursts within the brick-tessellated subframe are referenced using a brick-based coordinate system in which burst location and size are specified in units of bricks. A method for assembling and disassembling brick-based superframes is also disclosed. Bricked-based superframes are assembled and disassembled using a Superframe Preamble, a Superframe Control Header (SFCH), a Superframe Downlink Map (SDL-MAP), a Superframe Uplink MAP (SUL-MAP) and brick-structured downlink and uplink frames.

Methods for superframe/frame overhead reduction within OFDMA-based communication systems

Techniques for acknowledging message reception in a wireless OFDM/OFDMA system in clue receiving an unsolicited MAC management message at a subscriber station, operating the subscriber station to generate an acknowledgement (ACK) signal when the subscriber station receives the message from a base station, providing a pre-allocated uplink resource for the subscriber station to transmit the ACK signal to the base station without making a request to the base station for sending the ACK signal and sending the ACK signal consisting of a MAC header transmitted at the pre-allocated uplink source.

Efficient acknowledgement messaging in wireless communications

Systems and techniques for signaling between a subordinate base station and a superordinate base station in a wireless network with wireless relay stations to inform the superordinate base station of a failure in establishing an uplink related to the subordinate base station and scheduling wireless resource allocation between a base station and one or more relay stations.

Signaling for multi-hop relay in wireless communication systems

A method for improving transmission efficiency of physical layer attributes in a wireless communication system is proposed, and the method comprises the following steps of: (a) defining one or more sets of physical layer channel basic attributes that must be supported, and each set being respectively represented by a value of a domain of attributes, that is, a value of Profile; (b) a transmitting apparatus sending a physical layer channel description information, wherein the value of Profile is used to represent the physical layer channel basic attributes supported by the apparatus; (c) after receiving the channel description information, based on the value of Profile within the information, a receiving apparatus judging whether a set of physical layer channel basic attributes corresponding to the value is supported.

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San Diego, CA, United States of America

Sean Cai