PHY layer parameters for body area network (BAN) devices
AssigneeTexas Instruments Incorporated
InventorsAnuj Batra, Timothy M. Schmidl, Srinath Hosur, June Chul Roh
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Abstract
In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.
Claims16
A method of operating a physical layer (PHY) of a transceiver, comprising:
- transforming a physical-layer service data unit (PSDU) into a physical-layer protocol data unit (PPDU) that includes the PSDU pre-appended with a physical-layer convergence protocol (PLCP) preamble and a PLCP header, the PLCP header including a Bose, Ray-Chaudhuri, Hocquenghem (BCH) parity bits field;
- selecting a frequency band having a channel center frequency (fc) and a channel bandwidth (fBW);
- transmitting the PPDU with the selected frequency band and under a transmitted spectral mask having a −20 dBr level relative to a predetermined spectral density for a transmission frequency less than fc -fBW/2 or greater than fc +fBW/2;
- defining a reception-to-transmission turnaround (RX-to-TX) time based on an inter-frame spacing parameter (pSIFS);
- receiving a signal at the RX-to-TX time before transmitting the PPDU;
- and
- detecting an energy (ED) value of a received signal within the channel bandwidth (fBW) of the selected frequency band for an energy detection time (pEDTime) of 8 preamble symbol periods.
A device, comprising:
- a transceiver having a physical layer (PHY) including:
- means for transforming a physical-layer service data unit (PSDU) into a physical-layer protocol data unit (PPDU) that includes the PSDU pre-appended with a physical-layer convergence protocol (PLCP) preamble and a PLCP header, the PLCP header including a Bose, Ray-Chaudhuri, Hocquenghem (BCH) parity bits field;
- means for selecting a frequency band having a channel center frequency (fc) and a channel bandwidth (fBW);
- means for transmitting the PPDU with the selected frequency band and under a transmitted spectral mask having a −20 dBr level relative to a predetermined spectral density for a transmission frequency less than fc -fBW/2 or greater than fc +fBW/2;
- means for defining a reception-to-transmission turnaround (RX-to-TX) time based on an inter-frame spacing parameter (pSIFS);
- means for receiving a signal at the RX-to-TX time before the transmitting the PPDU;
- and
- means for detecting an energy (ED) value of a received signal within the channel bandwidth (fBW) of the selected frequency band for an energy detection time (pEDTime) of 8 preamble symbol periods.
Dependencies are inferred from the claim text.