Multiple component carrier OFDMA communication system
View Patent ↗A method of enhancing a downlink channel coding structure in an OFDMA (orthogonal frequency division multiple access) communication system is provided. The method includes: segmenting a concatenation of multiple transport blocks amongst multiple component carriers; and separately performing link adaptation for each component carrier according to channel conditions experienced by that component carrier.
1. A method of downlink channel coding, implemented in a base station used in an OFDMA, orthogonal frequency division multiple access, communication system, the method comprising:
performing rate-matching on each of multiple transport blocks;
permutating a concatenation of the rate-matched multiple transport blocks;
segmenting the permutated concatenation of rate-matched multiple transport blocks into multiple physical channels to be mapped on multiple component carriers such that each of the rate-matched multiple transport blocks is distributed amongst the multiple physical channels for each transmission time interval; and
performing link adaptation for each component carrier according to a channel condition experienced by said each component carrier.
2. The method according to claim 1 , wherein the link adaptation includes:
adapting a modulation scheme for said each component carrier.
3. The method according to claim 2 , wherein the link adaptation includes:
adapting the number of transmit streams for said each component carrier.
4. The method according to claim 3 , wherein the link adaptation includes:
adapting precoding for said each component carrier.
5. The method according to claim 2 , wherein the link adaptation includes:
adapting precoding for said each component carrier.
6. The method according to claim 1 , wherein the link adaptation includes:
adapting the number of transmit streams for said each component carrier.
7. The method according to claim 6 , wherein the link adaptation includes:
adapting precoding for said each component carrier.
8. The method according to claim 1 , wherein the link adaptation includes:
adapting precoding for said each component carrier.
9. The method according to claim 1 , wherein the link adaptation includes:
adapting a transmission scheme for said each component carrier.
10. The method according to claim 9 , wherein the link adaptation includes:
adapting modulation scheme for said each component carrier.
11. The method according to claim 9 , wherein the link adaptation includes:
adapting the number of transmit streams for said each component carrier.
12. The method according to claim 9 , wherein the link adaptation includes:
adapting precoding for said each component carrier.