FRAMING FOR AN ADAPTIVE MODULATION COMMUNICATION SYSTEM
First Claim
1. A method of enabling communication between a base station and a plurality of cellular teletphones, comprising:
- enabling the base station to,encode control information for the cellular telephones scheduled to receive downlink (DL) data in a DL frame and cellular telephones scheduled to transmit data in an uplink (UL) frame, the control information including,a preamble for synchronization of the cellular telephones to the base station;
information about DL transmission resources allocated to cellular telephones scheduled to receive DL data in the DL frame, a DL transmission resource being associated with a DL physical (PHY) mode,information about UL transmission resources allocated to cellular telephones scheduled to transmit data in the UL frame, an UL transmission resource being associated with an UL PHY mode,encode the DL data using the associated DL PHY mode, in the DL frame, andtransmit the DL frame and the control information to the plurality of cellular telephones;
enabling at a first cellular telephone to,achieve downlink synchronization with the base station and establish a downlink from the base station over one or more DL orthogonal frequency division multiplexing (OFDM) sub channels,receive from the base station the DL data and decode the DL data using the information about the DL transmission resource and the associated DL physical (PHY) mode; and
enabling a second cellular telephone to,achieve uplink synchronization with the base station and establish an uplink to the base station over one or more UL OFDM subchannels,encode the UL data using the information about the UL transmission resource and the associated UL PHY mode, andtransmit the UL data to the base station in the UL frame.
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Accused Products
Abstract
A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antenna at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals.
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Citations
22 Claims
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1. A method of enabling communication between a base station and a plurality of cellular teletphones, comprising:
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enabling the base station to, encode control information for the cellular telephones scheduled to receive downlink (DL) data in a DL frame and cellular telephones scheduled to transmit data in an uplink (UL) frame, the control information including, a preamble for synchronization of the cellular telephones to the base station; information about DL transmission resources allocated to cellular telephones scheduled to receive DL data in the DL frame, a DL transmission resource being associated with a DL physical (PHY) mode, information about UL transmission resources allocated to cellular telephones scheduled to transmit data in the UL frame, an UL transmission resource being associated with an UL PHY mode, encode the DL data using the associated DL PHY mode, in the DL frame, and transmit the DL frame and the control information to the plurality of cellular telephones; enabling at a first cellular telephone to, achieve downlink synchronization with the base station and establish a downlink from the base station over one or more DL orthogonal frequency division multiplexing (OFDM) sub channels, receive from the base station the DL data and decode the DL data using the information about the DL transmission resource and the associated DL physical (PHY) mode; and enabling a second cellular telephone to, achieve uplink synchronization with the base station and establish an uplink to the base station over one or more UL OFDM subchannels, encode the UL data using the information about the UL transmission resource and the associated UL PHY mode, and transmit the UL data to the base station in the UL frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless system comprising:
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a base station enabled to, encode control information for the cellular telephones scheduled to receive downlink (DL) data in a DL frame and cellular telephones scheduled to transmit data in an uplink (UL) frame, the control information including, a preamble for synchronizing the cellular telephones to the base station; information about DL transmission resources allocated to cellular telephones scheduled to receive DL data in the DL frame, the information about a DL transmission resource for each cellular telephone scheduled to receive data in the DL frame being associated with a DL physical (PHY) mode, information about UL transmission resources allocated to cellular telephones scheduled to transmit data in the UL frame, the information about a UL transmission resource for each cellular telephone scheduled to transmit data in the UL frame being associated with a UL PHY mode, encode the DL data using the information about DL transmission resource allocated to cellular telephones scheduled to transmit DL data in the DL frame; and transmit the DL frame with the control information to the plurality of cellular telephones; and a cellular telephone enabled to, achieve downlink synchronization with the base station and establish a downlink to the base station over one or more DL orthogonal frequency division multiplexing (OFDM) subchannels, receive from the base station the information about the DL transmission resource allocated to the cellular telephone in the DL frame, and decode the DL data from the DL frame using the information about the DL transmission resource allocated to the cellular telephone in the DL frame. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification