Modified range requests enabling bandwidth requests and state of health reporting
A modified ranging request in a broadband communications system. The modified ranging request includes a header, a management message header attached to the header, a management message payload attached to the management message header, and a CRC attached to the management message payload. The management message header enables bandwidth requests to be made by subscriber equipment without contention. The management message header also includes state of health information on the status of a downstream transmission for enabling a central location to determine how to assign subscribers to queues in an adaptive modulation scheme.
1. A broadband communications system, comprising:
a subscriber configured to provide a modified range request Media Access Control (MAC) management message, said modified range request MAC management message including:
a header,
a management message header, including a bandwidth request for subsequent transmissions, attached to said header,
a management message payload attached to said management message header,
and a cyclic redundancy check (CRC) attached to said management message payload;
and a central location configured to provide, in response to said modified range request MAC management message, a range response back to said subscriber, said range response including timing and frequency offset adjustment information to be used by said subscriber,
wherein said management message header enables said central location to grant said bandwidth request for said subsequent transmissions by said subscriber without contention.
2. The broadband communications system of claim 1 , wherein said bandwidth request comprises:
a piggybank request configured to enable said subscriber to make said bandwidth request for said subsequent transmissions without being subject to contention.
3. The broadband communications system of claim 1 , wherein said management message header comprises:
state of health information configured to enable said central location to determine how to assign said subscriber to queues in an adaptive modulation scheme.
4. The broadband communications system of claim 1 , wherein said central location is a satellite gateway and said subscriber is a satellite modem.
5. The broadband communications system of claim 1 , wherein said central location is a wireless access termination system and said subscriber is a wireless modem.
6. The broadband communications system of claim 1 , wherein said central location is a headend and said subscriber is a cable modems.
7. A broadband communications system, comprising:
a subscriber configured to provide a modified range request Media Access Control (MAC) management message, said modified range request MAC management message including:
a piggyback request configured to enable said subscriber to request bandwidth for subsequent transmissions in a non-contention environment,
and a plurality of parameters configured to indicate a status of a downstream transmission received by a given subscriber;
and a central location configured to provide, in response to said modified range request MAC management message, a range response back to said subscriber, said range response including timing and frequency offset adjustment information to be used by said subscriber.
8. The broadband communications system of claim 7 , wherein said piggyback request comprises:
at least two bits reserved for future use;
a Service ID parameter configured to identify said subscriber; and
a minislot request parameter configured to indicate a number of minislots needed.
9. The broadband communications system of claim 7 , wherein said plurality of parameters include state of health parameters, said state of health parameters including at least one of a group consisting of: downstream received power, signal-to-noise ratio, correctable code words, uncorrectable code words, transmit power, and transmit frequency.
10. The broadband communications system of claim 9 , wherein said state of health parameters are configured to enable said central location to determine how to assign said subscribers to queues in an adaptive modulation scheme.
11. The broadband communications system of claim 7 , wherein said central location is a satellite gateway and said subscribers are satellite modems.
12. The broadband communications system of claim 7 , wherein said central location is a headend and said subscribers are cable modems.
13. The broadband communications system of claim 7 , wherein said central location is a wireless access termination system and said subscribers are wireless modems.
14. A method for enabling bandwidth allocation to subscriber equipment in a broadband communications system, comprising:
(1) receiving a frame of data at a central location of the broadband communications system;
(2) determining at said central location whether said frame of data is a modified range request Media Access Conntrol (MAC) management message, said modified range request MAC management message including a piggyback request for bandwidth for subsequent transmissions;
(3) if said frame of data is said modified range request MAC management message, parsing at said central location said piggyback request within said frame to determine a subscriber equipment requesting bandwidth and a number of minislots requested; and
(4) granting, by said central location, bandwidth to said subscriber equipment requesting bandwidth, wherein said piggyback request enables said request for bandwidth to be made, by said subscriber equipment requesting bandwidth, without being subject to contention.
15. A method for obtaining status of a downstream transmission in a broadband communications system, said method comprising:
(1) receiving a frame of data at a central location of the broadband communications system;
(2) determining at said central location whether said frame of data is a modified range request Media Access Control (MAC) management message, said modified range request MAC management message including a management message header including a bandwidth request for subsequent transmissions;
(3) if said frame of data is said modified range request MAC management message, parsing at said central location said management message header of said frame of data to determine state of health information on the status of the downstream transmission; and
(4) using said state of health information to determine how to assign subscribers to queues in an adaptive modulation scheme.
16. The method of claim 15 , wherein said state of health information includes at least one of a group consisting of: downstream received power, signal-to-noise ratio, correctable code words, uncorrectable code words, transmit power, and transmit frequency.
17. The method of claim 15 , wherein a reserved (RSVD) field in said state of health information is used to directly specify a highest adaptive modulation queue that a subscriber is capable of receiving.
18. The broadband communications system of claim 1 , wherein said management message header enables said central location to immediately grant said bandwidth request for said subsequent transmissions by said subscriber without contention.