Permuting slots to logical distributed resource units
View Patent ↗Various example embodiments are disclosed. According to an example embodiment, a method may comprise sending, by a sending wireless station in a wireless network, data to a receiving wireless station, the data being sent via at least one logical distributed resource unit (LDRU), the LDRU including slots included in at least one physical resource unit (PRU), each of the slots included in the at least one PRU being associated with a different orthogonal frequency division multiple access (OFDMA) symbol and a different OFDMA subcarrier.
1. A method comprising:
sending, by a sending wireless station in a wireless network, data to a receiving wireless station, the data being sent via at least one logical distributed resource unit (LDRU), the LDRU including slots included in at least one physical resource unit (PRU), each of the slots included in the at least one PRU being associated with a different orthogonal frequency division multiple access (OFDMA) symbol and a different OFDMA subcarrier,
wherein the slots are associated with successive OFDMA symbols, and the slots are associated with subcarriers determined by:
Carrier( s,m,t )= N s *k +mod( F ( s,m ,perm_seq)+ f ( t ), N s )
wherein Carrier(s,m,t) is a subcarrier index of an m th subcarrier in a t th OFDMA symbol in an s th LDRU,
wherein N s is an integer,
wherein k is an integer determined by s and m,
wherein F(s,m,perm_seq) is a function with an integer value from 0 to N s −1,
wherein perm_seq is a permutation sequence calculated by “basic permutation sequence”, DL_PermBase, s, and m, where DL_PermBase is an integer, and
wherein f(t) is an integer value.
2. The method of claim 1 , wherein the at least one PRU includes six OFDMA symbols and eighteen OFDMA subcarriers.
3. The method of claim 1 , wherein the slots are associated with successive OFDMA symbols separated by N subcarriers, N being an integer number of at least one.
4. The method of claim 1 , wherein the slots are associated with successive OFDMA symbols, and with pseudorandomly assigned subcarriers.
5. The method of claim 1 , further comprising permuting the slots to the at least one LDRU.
6. The method of claim 1 , further comprising:
permuting the slots to the at least one LDRU; and
sending at least one allocation message allocating the LDRU to the receiving wireless station.
7. The method of claim 1 , further comprising receiving at least one allocation message allocating the LDRU to the sending wireless station.
8. The method of claim 1 , wherein the sending wireless station includes an IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX) base station.
9. The method of claim 1 , wherein the sending wireless station includes an IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX) relay station.
10. The method of claim 1 , wherein the sending wireless station includes an IEEE 802.16 Worldwide Interoperability for Microwave Access (WiMAX) mobile station.
11. The method of claim 1 , wherein each of the slots includes an orthogonal frequency division multiple access (OFDMA) symbol in a time domain and a subcarrier in a frequency domain.
12. A method comprising:
sending, by a sending wireless station in a wireless network, data to a receiving wireless station, the data being sent via at least one logical distributed resource unit (LDRU), the LDRU including slots included in at least one physical resource unit (PRU), each of the slots included in the at least one PRU being associated with a different orthogonal frequency division multiple access (OFDMA) symbol and a different OFDMA subcarrier,
wherein the slots are associated with successive OFDMA symbols, and the slots are associated with subcarriers determined by:
Carrier( s,m,t )= N s *k+F ( s,m,g (perm_seq, t ))
wherein Carrier(s,m,t) is a subcarrier index of an m th subcarrier in a t th OFDMA symbol in an s th LDRU,
wherein N s is an integer,
wherein k is an integer determined by s and m, and
wherein g(perm_seq, t) is a permutation sequence derived by perm_seq and t.
13. The method of claim 12 , wherein the at least one PRU includes six OFDMA symbols and eighteen OFDMA subcarriers.
14. The method of claim 12 , further comprising permuting the slots to the at least one LDRU.
15. The method of claim 12 , further comprising:
permuting the slots to the at least one LDRU; and
sending at least one allocation message allocating the LDRU to the receiving wireless station.
16. An apparatus comprising:
a processor, the processor being configured to:
generate a message including data for a wireless transceiver to send to a wireless station over an air interface via at least one logical distributed resource unit (LDRU), the LDRU including slots included in at least one physical resource unit (PRU), each of the slots included in the at least one PRU being associated with a different orthogonal frequency division multiple access (OFDMA) symbol and a different OFDMA subcarrier,
wherein the slots are associated with successive OFDMA symbols, and the slots are associated with subcarriers determined by:
Carrier( s,m,t )= N s *k+ mod( F ( s,m ,perm_seq)+ f ( t ), N s )
wherein Carrier(s,m,t) is a subcarrier index of an m th subcarrier in a t th OFDMA symbol in an s th LDRU,
wherein N s is an integer,
wherein k is an integer determined by s and m,
wherein F(s,m,perm_seq) is a function with an integer value from 0 to N s −1,
wherein perm_seq is a permutation sequence calculated by “basic permutation sequence”, DL_PermBase, s, and m, where DL_PermBase is an integer, and
wherein f(t) is an integer value.
17. The apparatus of claim 16 , wherein the at least one PRU includes six OFDMA symbols and eighteen OFDMA subcarriers.
18. The apparatus of claim 16 , wherein the processor is further configured to permute the slots to the at least one LDRU.
19. The apparatus of claim 16 , wherein the processor is further configured to:
permute the slots to the at least one LDRU; and
send at least one allocation message allocating the LDRU to the receiving wireless station.
20. A computer program product for a sending wireless station in a wireless network, the computer program product being tangibly embodied on a computer storage medium and including executable code that, when executed, is configured to cause the sending wireless station to:
send data to a receiving wireless station, the data being sent via at least one logical distributed resource unit (LDRU), the LDRU including slots included in at least one physical resource unit (PRU), each of the slots included in the at least one PRU being associated with a different orthogonal frequency division multiple access (OFDMA) symbol and a different OFDMA subcarrier,
wherein the slots are associated with successive OFDMA symbols, and the slots are associated with subcarriers determined by:
Carrier( s,m,t )= N s *k+ mod( F ( s,m ,perm_seq)+ f ( t ), N s )
wherein Carrier(s,m,t) is a subcarrier index of an m th subcarrier in a t th OFDMA symbol in an s th LDRU,
wherein N s is an integer,
wherein k is an integer determined by s and m,
wherein F(s,m,perm_seq) is a function with an integer value from 0 to N s −1,
wherein perm_seq is a permutation sequence calculated by “basic permutation sequence”, DL_PermBase, s, and m, where DL_PermBase is an integer, and
wherein f(t) is an integer value.