Phy layer options for body area network (BAN) devices
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 using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions.
1. A physical (PHY) layer method, comprising:
performing body area network (BAN) operations in a limited multipath environment using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK, including:
preparing a BAN packet for transmission, the BAN packet comprising a physical-layer protocol data unit (PPDU) having a physical-layer convergence protocol (PLCP) preamble, a PLCP header, and a physical-layer service data unit (PSDU); and
preparing the PLCP header with a 15-bit PHY header field, a 4-bit HCS field, and a 12-bit Bose, Ray-Chaudhuri, Hocquenghem (BCH) parity bit field; and
transmitting BAN packets at a constant symbol rate.
2. The method of claim 1 wherein performing BAN operations comprises
preparing the PLCP header with a 15-bit PHY header field, a 4-bit HCS field, and a 12-bit Bose, Ray-Chaudhuri, Hocquenghem (BCH) parity bit field.
3. The method of claim 1 further comprising preparing the PHY header with a 3-bit rate field, an 8-bit length field, a 1-bit scrambler seed field, and a 1-bit burst mode field.
4. The method of claim 1 further comprising preparing the PSDU with a 7-byte MAC header, a variable-byte MAC frame body, and a 2-byte FCS.
5. The method of claim 1 further comprising transmitting and receiving data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450.
6. The method of claim 5 further comprising, if the 402-405 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 187.5 ksps, a code rate of approximately 19/31, a spreading factor of 2, a SRRC pulse shape, and an information data rate of approximately 57.5 kbps.
7. The method of claim 5 further comprising, if the 402-405 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK, π/4-DQPSK, or π/8-D8PSK, with a symbol rate of approximately 187.5 ksps, a code rate of approximately 51/63, a spreading factor of 1 or 2, a SRRC pulse shape, and an information data rate of approximately 75.9 kbps, 151.8 kbps, 303.6 kbps, or 455.5 kbps.
8. The method of claim 5 further comprising, if the 420-450 MHz frequency band is used, selectively modulating the PLCP header based on GMSK with a symbol rate of approximately 187.5 ksps, a code rate of approximately 19/31, a spreading factor of 2, a bandwidth-bit duration (BT) of approximately 0.5, and an information data rate of approximately 57.5 kbps.
9. The method of claim 5 further comprising, if the 420-450 MHz frequency band is used, selectively modulating the PSDU based on GMSK with a symbol rate of approximately 187.5 ksps, a code rate of approximately 51/63 or 1/1, a spreading factor of 1 or 2, a bandwidth-bit duration (BT) of approximately 0.5, and an information data rate of approximately 75.9 kbps, 151.8 kbps, or 187.5 kbps.
10. The method of claim 5 further comprising, if the 863-870 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 250 ksps, a code rate of approximately 19/31, a spreading factor of 2, a SRRC pulse shape, and an information data rate of approximately 76.6 kbps.
11. The method of claim 5 further comprising, if the 863-870 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK, π/4-DQPSK, or π/8-D8PSK, with a symbol rate of approximately 250 ksps, a code rate of approximately 51/63, a spreading factor of 1 or 2, a SRRC pulse shape, and an information data rate of approximately 101.2 kbps, 202.4 kbps, or 404.8 kbps.
12. The method of claim 5 further comprising, if the 902-928 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 300 ksps, a code rate of approximately 19/31, a spreading factor of 2, a SRRC pulse shape, and an information data rate of approximately 91.9 kbps.
13. The method of claim 5 further comprising, if the 902-928 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK, π/4-DQPSK, or π/8-D8PSK, with a symbol rate of approximately 300 ksps, a code rate of approximately 51/63, a spreading factor of 1 or 2, a SRRC pulse shape, and an information data rate of approximately 121.4 kbps, 242.9 kbps, 485.7 kbps, or 728.6 kbps.
14. The method of claim 5 further comprising, if the 950-956 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 250 ksps, a code rate of approximately 19/31, a spreading factor of 2, a SRRC pulse shape, and an information data rate of approximately 76.6 kbps.
15. The method of claim 5 further comprising, if the 950-956 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK, π/4-DQPSK, or π/8-D8PSK, with a symbol rate of approximately 250 ksps, a code rate of approximately 51/63, a spreading factor of 1 or 2, a SRRC pulse shape, and an information data rate of approximately 101.2 kbps, 202.4 kbps, 404.8 kbps, or 607.1 kbps.
16. The method of claim 5 further comprising, if the 2360-2400 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 600 ksps, a code rate of approximately 19/31, a spreading factor of 4, a SRRC pulse shape, and an information data rate of approximately 91.9 kbps.
17. The method of claim 5 further comprising, if the 2360-2400 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK or π/4-DQPSK with a symbol rate of approximately 600 ksps, a code rate of approximately 51/63, a spreading factor of 1, 2 or 4, a SRRC pulse shape, and an information data rate of approximately 121.4 kbps, 242.9 kbps, 485.7 kbps, or 971.4 kbps.
18. The method of claim 5 further comprising, if the 2400-2483.5 MHz frequency band is used, selectively modulating the PLCP header based on π/2-DBPSK with a symbol rate of approximately 600 ksps, a code rate of approximately 19/31, a spreading factor of 4, a SRRC pulse shape, and an information data rate of approximately 91.9 kbps.
19. The method of claim 5 further comprising, if the 2400-2483.5 MHz frequency band is used, selectively modulating the PSDU based on π/2-DBPSK or π/4-DQPSK with a symbol rate of approximately 600 ksps, a code rate of approximately 51/63, a spreading factor of 1, 2 or 4, a SRRC pulse shape, and an information data rate of approximately 121.4 kbps, 242.9 kbps, 485.7 kbps, or 971.4 kbps.