In a wireless communication system that includes a base station, a plurality of relay stations that are moving, and a plurality of terminal stations in a service area, and performs downlink multiple access from the base station to each of the plurality of terminal stations via one or more relay stations of the plurality of relay stations, the base station includes a downlink multiple access unit configured to identify a relay station of the plurality of relay stations transmitting a signal receivable in the service area based on positions of the plurality of relay stations, frequency multiplex-transmit a data signal in a different frequency band to each of the plurality of terminal stations via the relay station, and spatial multiplex-transmit a data signal to a terminal station of the plurality of terminal stations supporting spatial multiplex transmission in a particular frequency band and via the plurality of relay stations.

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams.

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams.

A system and method for providing multiple modes of communication in wireless networks includes a network manager and a plurality of network nodes. The plurality of network nodes form a wireless network with the network manager and are configured to communicate data to the network manager using respective communication links having a first bandwidth. The plurality of network nodes are further configured to transition to a two-hop mode of communication upon one or more failures in communication to the network manager. While in the two-hop mode of communication, a respective network node of the plurality of nodes is configured to transmit node data to at least one other network node over a communication link having a second bandwidth different than the first bandwidth. The other network nodes are configured to listen for communication from the respective network node and re-transmit to the network manager the node data received from the respective network node.

A system and method for providing multiple modes of communication in wireless networks includes a network manager and a plurality of network nodes. The plurality of network nodes form a wireless network with the network manager and are configured to communicate data to the network manager using respective communication links having a first bandwidth. The plurality of network nodes are further configured to transition to a two-hop mode of communication upon one or more failures in communication to the network manager. While in the two-hop mode of communication, a respective network node of the plurality of nodes is configured to transmit node data to at least one other network node over a communication link having a second bandwidth different than the first bandwidth. The other network nodes are configured to listen for communication from the respective network node and re-transmit to the network manager the node data received from the respective network node.

The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol.

The invention relates to inserting reference signals in a radio signal to be transmitted over a wireless communication system, the radio signal being emitted according to a specific SS-STBC scheme, the method comprising, inserting the reference signals to transmit them in the radio signal such as samples of these reference signals are in specific positions in the SS-STBC symbol.

A system and method for providing multiple modes of communication in wireless networks includes a network manager and a plurality of network nodes. The plurality of network nodes form a wireless network with the network manager and are configured to communicate data to the network manager using respective communication links having a first bandwidth. The plurality of network nodes are further configured to transition to a two-hop mode of communication upon one or more failures in communication to the network manager. While in the two-hop mode of communication, a respective network node of the plurality of nodes is configured to transmit node data to at least one other network node over a communication link having a second bandwidth different than the first bandwidth. The other network nodes are configured to listen for communication from the respective network node and re-transmit to the network manager the node data received from the respective network node.