A communications system including a transmit processor for determining transmit and azimuth elevation in response to a refractive layer altitude, a transmitter array including a plurality of transmitters each for transmitting one of a plurality of transmitted signals in response to the transmit elevation wherein each of the plurality of transmitted signals is encoded using a data signal and one of a plurality of unique synchronization sequences, and a receiver for receiving the plurality of transmitted signals, isolating each of the plurality of transmitted signals in response to one of the plurality of unique synchronization sequences corresponding to each of the plurality of transmitted signals to generate a plurality of isolated signals, to combine the plurality of isolated signals to generate a combined signal and to generate the data signal in response to the combined signal.

The base station that is configured to transmit in a beamformed manner may set different transmission rates for different directions of the beams. During an initial access stage, the base station may determine how densely user equipments are located in various regions surrounding the base station, and may assign more beams for transmission of an initial access signal in an area with more UEs. The apparatus may be a base station. The base station divides a region surrounding the base station into a plurality of sub-regions, where one region of the plurality of sub-regions covers a greater area than at least one other region of the plurality of sub-regions. The base station assigns each beam of a plurality of beams of the base station to a respective sub-region of the plurality of sub-regions. The base station transmits at least one initial access signal in each direction of the plurality of beams using a respective beam of the plurality of beams, each direction of the plurality of beams corresponding to a respective sub-region of the plurality of sub-regions.

Logic may implement a restricted access window association scheme that uses information provided in traffic indication map (TIM) bitmap and restricted access window (RAW) parameter set (PS) to determine stations associated with RAWs. The TIM information element (IE) may comprise a bitmap indicating paged and unpaged stations. The RAW PS IE may comprise a range of station association identifiers (AIDs) and possibly other station selection data. Logic may determine a range of stations associated with a RAW based upon AIDs for the first and last stations in the range based upon a position for the station in the TIM bitmap. And the range of stations associated with a RAW may be independent of block associations of the first and last stations in the TIM bitmap.

Logic may implement a restricted access window association scheme that uses information provided in traffic indication map (TIM) bitmap and restricted access window (RAW) parameter set (PS) to determine stations associated with RAWs. The TIM information element (IE) may comprise a bitmap indicating paged and unpaged stations. The RAW PS IE may comprise a range of station association identifiers (AIDs) and possibly other station selection data. Logic may determine a range of stations associated with a RAW based upon AIDs for the first and last stations in the range based upon a position for the station in the TIM bitmap. And the range of stations associated with a RAW may be independent of block associations of the first and last stations in the TIM bitmap.

The base station that is configured to transmit in a beamformed manner may set different transmission rates for different directions of the beams. During an initial access stage, the base station may set different transmission rates for different transmission directions, and may transmit initial access signals based on the transmission rates in the different transmission directions The apparatus may be a base station. The base station determines transmission rates for a plurality of transmission directions, where each transmission rate is determined for a respective transmission direction of the plurality of transmission directions. The base station transmits at least one initial access signal in each of one or more of the plurality of transmission directions based on a corresponding transmission rate of the transmission rates.

The base station that is configured to transmit in a beamformed manner may set different transmission rates for different directions of the beams. During an initial access stage, the base station may determine how densely user equipments are located in various regions surrounding the base station, and may assign more beams for transmission of an initial access signal in an area with more UEs. The apparatus may be a base station. The base station divides a region surrounding the base station into a plurality of sub-regions, where one region of the plurality of sub-regions covers a greater area than at least one other region of the plurality of sub-regions. The base station assigns each beam of a plurality of beams of the base station to a respective sub-region of the plurality of sub-regions. The base station transmits at least one initial access signal in each direction of the plurality of beams using a respective beam of the plurality of beams, each direction of the plurality of beams corresponding to a respective sub-region of the plurality of sub-regions.

A network of handling a communication operation comprises instructions of transmitting a duration of a subframe of a first type to a communication device; transmitting a multiplexing scheme for the subframe of the first type and a subframe of a second type to the communication device, wherein the duration of the subframe of the first type is shorter than a duration of the subframe of the second type; determining a duration of a subframe of a third type, wherein the duration of the subframe of the second type is not an integral multiple of the duration of the subframe of the first type; transmitting the duration of the subframe of the third type to the communication device; and performing the communication operation in a plurality of subframes of the first type in at least one subframe of the third type according to the multiplexing scheme via a physical channel.

Logic may implement a restricted access window association scheme that uses information provided in traffic indication map (TIM) bitmap and restricted access window (RAW) parameter set (PS) to determine stations associated with RAWs. The TIM information element (IE) may comprise a bitmap indicating paged and unpaged stations. The RAW PS IE may comprise a range of station association identifiers (AIDs) and possibly other station selection data. Logic may determine a range of stations associated with a RAW based upon AIDs for the first and last stations in the range based upon a position for the station in the TIM bitmap. And the range of stations associated with a RAW may be independent of block associations of the first and last stations in the TIM bitmap.

A system and method for synchronizing the operation of a wireless mobile station (102) and a base station (104) includes receiving a message at the base station (104) indicating a state of operation of the wireless mobile station (102). A determination is made as to whether the base station (104) and the mobile station (102) are in synchronization based upon comparing the state of operation of the mobile station (102) and a state of operation of the base station (104).

A single wireless slave node may be in a timing virtual network (TVN) with neighboring wireless slave nodes. The single wireless slave node may store information indicative of the identity, link propagation delay, and channel signature of each of its neighboring wireless slave nodes. The single wireless slave node may repeatedly update a timing estimate based on the stored information and by performing a physical layer fast reference signal broadcast transmission and reception.