Abstract: A method, system, and wireless frame structure for supporting different modes of multiple radio access. The described system comprises base stations and terminals. There is a group of base stations at the same location, which include at least two synchronized base stations on the same frequency band, supporting different multiple access techniques in downlink or uplink. The base stations in the described group transmit downlink frames in a negotiated downlink zone and receive uplink frames in a negotiated uplink zone respectively, and the zones of the base stations are not overlapped. Each terminal accesses to one of the base stations according to the downlink multiple access technique that it supports, and receives/transmits signals in the downlink zone/uplink zone allocated to the base station.

Abstract: Techniques of selective demodulation of downlink frames using a subscriber description segment or activity descriptor to identify one or more subscriber stations to which at least a portion of data placed in the downlink frame is addressed in wireless communication systems such as frame-based point-to-multipoint wireless communication systems. The described techniques can be used to reduce power consumption at each subscriber station and to elongate the battery time of mobile devices, especially in the bursty Internet data transmission. The subscriber station can use information in the subscriber description segment or activity descriptor to decide whether to turn off receiver power for the remainder of a received downlink frame.

Abstract: 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.

Abstract: A system and a method for supporting a plurality of multiple access technologies and the frame structure thereof, wherein, the method comprises the following steps: a base station sending a downlink frame which comprises at least one downlink multiple access zone, wherein each downlink multiple access zone supports one downlink multiple access technology and each downlink multiple access zone associates with one or more uplink multiple access zones supporting different uplink multiple access technologies; a terminal searching the synchronization signal of the downlink multiple access technology that it supports, and obtaining the uplink control message after establishing synchronization with the base station, and according to the information within the uplink control message, determining that there is the uplink multiple access technology that it supports, and performing initial network access according to the information of the initial access zone indicated in the uplink control message.

Abstract: 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.

Abstract: Radio resource management for wireless cellular networks equipped with relay stations for multi-hop packet or protocol data unit (PDU) relaying.

Abstract: Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example, the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain and the resulting time-domain waveform is a near-CAZAC sequence.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Techniques for fast cell search, selection and reselection for wireless communication systems such as OFDM or OFDMA communication systems. In various implementations of the described techniques, downlink subframes from base stations to mobile stations are designed to include information in form of preambles or post-ambles in one or more downlink subframes to facilitate cell search at receiving mobile stations at high speeds. The described preambles and post-ambles may also be used to improve the accuracy of signal synchronization in time and frequency.

Abstract: A method for terminating connections to wireless relay stations (RS), applied in a system comprising a wireless communication network set, which comprises a base station (BS) and RSs subordinated to the base station. The method comprises: (a) a wireless RS, RS1, already connecting to a wireless communication network set, and the BS in the set or a wireless RS working as an agent node in a communication sub-network where RS1 attached determining that the connection of RS1 needs to be terminated; (b) the BS or the wireless RS working as the agent node sending a connection termination message to RS1 and releasing RS1's resource; (c) after receiving a connection termination instruction, RS1 releasing the resource to terminate the connection to the wireless communication network. The present invention fulfills the termination of a connection relationship to a wireless RS, and guarantees quality of service in the wireless communication network set.

Abstract: A method for a device to join a wireless communication network, after the device accesses to the wireless communication network group through a source node, the method comprising the following steps of: (a) if the device needs a handover, completes the handover successfully by accessing to a target node and establishes a service connection, proceeding to step (b), otherwise proceeding to step (c); (b) a management node of the wireless communication network group to which the target node accessed to by the device belongs updating a stored wireless network topology information of the wireless network group, to complete the joining of said wireless communication device, and the method ending; (c) a management node of the wireless communication network group to which the source node accessed to by the device belongs updating a stored wireless network topology information of the wireless communication network group, to complete the joining of said device.

Abstract: A method, system, and wireless frame structure for supporting different modes of multiple radio access. The described system comprises base stations and terminals. There is a group of base stations at the same location, which include at least two synchronized base stations on the same frequency band, supporting different multiple access techniques in downlink or uplink. The base stations in the described group transmit downlink frames in a negotiated downlink zone and receive uplink frames in a negotiated uplink zone respectively, and the zones of the base stations are not overlapped. Each terminal accesses to one of the base stations according to the downlink multiple access technique that it supports, and receives/transmits signals in the downlink zone/uplink zone allocated to the base station.

Abstract: A system and a method for supporting a plurality of multiple access technologies and the frame structure thereof, wherein, the method comprises the following steps: a base station sending a downlink frame which comprises at least one downlink multiple access zone, wherein each downlink multiple access zone supports one downlink multiple access technology and each downlink multiple access zone associates with one or more uplink multiple access zones supporting different uplink multiple access technologies; a terminal, searching the synchronization signal of the downlink multiple access technology that it supports, and obtaining the uplink control message after establishing synchronization with the base station, and according to the information within the uplink control message, determining that there is the uplink multiple access technology that it supports, and performing initial network access according to the information of the initial access zone indicated in the uplink control message.