System, method, and computer program product for scheduling burst profile changes based on minislot count
View Patent ↗A system and method are presented for changing physical layer (PHY) parameters in a PHY device of a communications system. New parameters are written to a first-in first-out queue in a serial interface, while the scheduled time for the changeover is written to a control register in the serial interface. When the time for the changeover occurs, the parameters are written to the PHY device via a port of the serial interface.
1. A system to change one or more physical layer communications parameters as configured in a physical layer device of a wireless communications system, the system comprising:
a first interface for receiving the parameters; and
a serial interface, in a Media Access Controller coupled to the first interface, configured to:
store the parameters received by the first interface in advance of sending the parameters to the physical layer device, and
send the parameters to the physical layer device at a predetermined time, wherein the parameters correspond to a burst profile that is used to reprogram the physical layer device of the wireless communications system.
2. The system of claim 1 , wherein the first interface is a peripheral component interconnect (PCI) interface.
3. The system of claim 1 , wherein the serial interface is a serial peripheral interface (SPI).
4. The system of claim 1 , further comprising:
a central processing unit (CPU) configured to send the parameters to the first interface.
5. The system of claim 1 , wherein the serial interface comprises:
a transmit first-in first-out (FIFO) queue configured to store the parameters;
a serial interface port configured to send the parameters to the physical layer device; and
one or more control registers configured to store an indication of the predetermined time at which the parameters are to be sent from the transmit queue to the physical layer device.
6. The system of claim 5 , wherein the one or more control registers are further configured to store a channel identifier which corresponds to a communications channel to which the parameters pertain.
7. A method of changing one or more physical layer communications parameters in a physical layer device of a wireless communications system, comprising:
receiving the parameters;
storing the parameters in a serial interface;
receiving information specifying a point in time at which the parameters are to changeover; and
at the point in time at which the parameters are to changeover, writing the parameters to the physical layer device of the wireless communications system.
8. The method of claim 7 , wherein the parameters correspond to a burst profile that is used to reprogram the physical layer device of the wireless communications system.
9. The method of claim 7 , wherein the storing comprises storing the parameters in a transmit first-in first-out (FIFO) queue in the serial interface.
10. The method of claim 7 , wherein the point in time at which the parameters are to changeover corresponds to a minislot count.
11. The method of claim 7 , further comprising:
storing an indication of the point in time at which the parameters are to changeover in one or more control registers of the serial interface prior to the writing.
12. The method of claim 7 , wherein the writing comprises:
writing the parameters to the physical layer device via a serial interface port in the serial interface.
13. The method of claim 7 , further comprising:
receiving periodic updates of a current time prior to the writing.
14. The method of claim 13 , wherein the periodic updates are minislot counts.
15. The method of claim 7 , further comprising:
storing the point in time at which the parameters are to changeover in the serial interface prior to the writing.
16. The system of claim 1 , wherein the predetermined time is based on a minislot count.
17. The system of claim 1 , wherein the serial interface further comprises a control register configured to store the predetermined time at which the parameters are to be sent from a transmit queue in the serial interface to the physical layer device.
18. The system of claim 1 , wherein the parameters corresponding to the burst profile include one or more of: a number of symbols to be transmitted upstream per second, a number of bits per symbol, a specification of a modulation process, or a method of error detection or correction.