Abstract: A method for transmitting data in a wireless network includes wirelessly transmitting data from a base station to a plurality of spatially separated relay stations. The data is correlated according to space-time block coding (STBC) for transmission over multiple antennas. The STBC correlated data are wirelessly transmitted from the plurality of spatially separated relay stations to a mobile station. The plurality of spatially separated relay stations cooperate to provide a single multiple antenna transmission.

Abstract: An orthogonal frequency division multiple access (OFDMA) frame for transmitting data between a mobile station and a base station includes a downlink subframe including a region for transferring first data to the base station and second data to a relay station at substantially the same time and frequency, and an uplink subframe.

Abstract: A method for transmitting data in a wireless network includes generating a packet of data having a connection identification (CID) indicating a connection to a final destination for the packet of data. A desired path for transmitting the packet of data to the final destination is determined. The desired path includes one or more relay stations. The generated packet of data is encapsulated in one or more capsules, each capsule having a CID indicating a connection to one of the one or more relay stations along the desired path. The packet of data is routed along the desired path using the CIDs of the one or more capsules and the packet of data to arrive at the final destination. At each of the one or more relay station, an outer-most capsule having a CID corresponding to the present relay station is stripped from the packet of data.

Abstract: A method is provided for allocation downlink bursts in a data region of a OFDMA data system, such data region having along one axis thereof increasing logical sub channel numbers and along another axis thereof increasing OFDMA symbol numbers, and wherein the burst are allocated into rectangular shaped sub regions within the data region. In one embodiment, the method allocates the bursts into rectangular shaped sub regions of the data region with minimum unused sub regions within the data region. In one embodiment, the method creates and locates the data region with minimum unused slots at the lowest logical sub channel number and the lowest OFDMA symbol number. In another embodiment, the method allocates the bursts within a data region having the largest number of OFDMA symbol numbers and then reduces the OFDMA symbol numbers of the data region only when the data region with the smaller OFDMA symbol numbers has less number of unused slots.

Abstract: A method for transmitting a signal in a wireless network includes sending a first signal from a first source to a first intermediate station. A second signal is sent from a second source to a second intermediate station. The first signal is additionally received by the second intermediate station. The second signal is encoded according to dirty paper coding (DPC) such that the first signal does not interfere with the transmission of the second signal. The first signal is sent from the first intermediate station to a first destination and simultaneously, the DPC encoded second signal is sent from the second intermediate station to a second destination.

Abstract: An H-ARQ system wherein the transmission of two consecutive, or sequential, blocks of information bits are considered jointly; i.e., one of the blocks of information being embedded within the other one of the blocks of information. If a retransmission for the first block is necessary, the system processes both blocks jointly. The system is provided with cross-packet coding which extends current H-ARQ schemes for point-to-point communications wherein the transmission of two consecutive block of information bits is considered jointly. If a retransmission for the first block is necessary, the system processes both blocks jointly. This allows both blocks to be decoded without errors at the receiver after the retransmission.

Abstract: An H-ARQ system wherein the transmission of two consecutive, or sequential, blocks of information bits are considered jointly; i.e., one of the blocks of information being embedded within the other one of the blocks of information. If a retransmission for the first block is necessary, the system processes both blocks jointly. The system is provided with cross-packet coding which extends current H-ARQ schemes for point-to-point communications wherein the transmission of two consecutive block of information bits is considered jointly. If a retransmission for the first block is necessary, the system processes both blocks jointly. This allows both blocks to be decoded without errors at the receiver after the retransmission.

Abstract: A method for transmitting data in a wireless network includes generating a packet of data having a connection identification (CID) indicating a connection to a final destination for the packet of data. A desired path for transmitting the packet of data to the final destination is determined. The desired path includes one or more relay stations. The generated packet of data is encapsulated in one or more capsules, each capsule having a CID indicating a connection to one of the one or more relay stations along the desired path. The packet of data is routed along the desired path using the CIDs of the one or more capsules and the packet of data to arrive at the final destination. At each of the one or more relay station, an outer-most capsule having a CID corresponding to the present relay station is stripped from the packet of data.

Abstract: A method for transmitting data in a wireless network includes wirelessly transmitting data from a base station to a plurality of spatially separated relay stations. The data is correlated according to space-time block coding (STBC) for transmission over multiple antennas. The STBC correlated data are wirelessly transmitted from the plurality of spatially separated relay stations to a mobile station. The plurality of spatially separated relay stations cooperate to provide a single multiple antenna transmission.

Abstract: An orthogonal frequency division multiple access (OFDMA) frame for transmitting data between a mobile station and a base station includes a downlink subframe including a region for transferring first data to the base station and second data to a relay station at substantially the same time and frequency, and an uplink subframe.

Abstract: A method for transmitting a signal in a wireless network includes sending a first signal from a first source to a first intermediate station. A second signal is sent from a second source to a second intermediate station. The first signal is additionally received by the second intermediate station. The second signal is encoded according to dirty paper coding (DPC) such that the first signal does not interfere with the transmission of the second signal. The first signal is sent from the first intermediate station to a first destination and simultaneously, the DPC encoded second signal is sent from the second intermediate station to a second destination.

Abstract: A method is provided for allocation downlink bursts in a data region of a OFDMA data system, such data region having along one axis thereof increasing logical sub channel numbers and along another axis thereof increasing OFDMA symbol numbers, and wherein the burst are allocated into rectangular shaped sub regions within the data region. In one embodiment, the method allocates the bursts into rectangular shaped sub regions of the data region with minimum unused sub regions within the data region. In one embodiment, the method creates and locates the data region with minimum unused slots at the lowest logical sub channel number and the lowest OFDMA symbol number. In another embodiment, the method allocates the bursts within a data region having the largest number of OFDMA symbol numbers and then reduces the OFDMA symbol numbers of the data region only when the data region with the smaller OFDMA symbol numbers has less number of unused slots.

Abstract: A multi-tier data storage system includes a first data storage unit for storing recently loaded data files; a second data storage unit coupled to the first data storage unit for archiving data files residing on the first data storage unit for more than a predetermined period of time; and, a third data storage unit coupled to the second data storage unit, the third data storage unit caching files archived in the second data storage unit if the data file is unavailable on the first data storage unit.