Signaling format for wireless communications
View Patent ↗Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.
1. A wireless communications device, comprising:
a transceiver that transmits and receives radio frequency (RF) signals; and
one or more processors coupled to the transceiver, wherein the one or more processors are configured to:
determine a coding format according to a signal field;
arrange at least one bit in the signal field to comply with a channel width; and
generate a coded signal field according to the coding format and the at least one bit in said signal field.
2. The wireless communications device according to claim 1 , wherein the one or more processors are configured to determine a number of reserve bits in said signal field.
3. The wireless communications device according to claim 2 , wherein the one or more processors are configured to determine that the number of reserve bits is 6.
4. The wireless communications device according to claim 2 , wherein the one or more processors are configured to determine that the number of reserve bits is 4.
5. The wireless communications device according to claim 2 , wherein the one or more processors are configured to determine that the number of reserve bits is 2 or less.
6. The wireless communications device according to claim 1 , wherein the one or more processors are configured to apply a constraint length to the signal field.
7. The wireless communications device according to claim 1 , wherein the one or more processors are configured to insert at least one tail bit into the signal field.
8. The wireless communications device according to claim 1 , wherein the one or more processors are configured to code the signal field using a convolutional code.
9. The wireless communications device according to claim 8 , wherein the convolutional code is used at a ½ rate.
10. The wireless communications device according to claim 8 , wherein the convolutional code is used at a ⅓ rate.
11. The wireless communications device according to claim 1 , wherein the one or more processors are further configured to encode the signal field using a reed-solomon block code.
12. The wireless communications device according to claim 11 , wherein the one or more processors are further configured to generate at least one codeword during the encoding.
13. The wireless communications device according to claim 1 , wherein the wireless communications device supports 802.11n communications.
14. The wireless communications device according to claim 1 , wherein the wireless communications device supports cellular communications.
15. The wireless communications device according to claim 1 , wherein the wireless communications device is a cellular phone.
16. The wireless communications device according to claim 1 , wherein the wireless communications device supports Bluetooth communications.
17. The wireless communications according to claim 1 , wherein the wireless communications device supports one or more of the following: global system for mobile communications (GSM), code division multiple access (CDMA), and wireless local area network.
18. The wireless communications according to claim 1 , wherein the wireless communications device supports orthogonal frequency division multiplexing.
19. A wireless communications device, comprising:
one or more transceivers that transmit and receive radio frequency (RF) signals; and
one or more processors coupled to the one or more transceivers, wherein the one or more processors are configured to:
generate a signal field having a rate/mode sub-field, a length sub-field, at least one data unit sub-field and a reserved sub-field;
determine a coding format according to the reserved sub-field;
arrange at least one bit in the sub-fields according to the coding format and a wireless communication standard for the signal field; and
code said signal field with the coding format.
20. The wireless communications device according to claim 19 , wherein the one or more processors are further configured to modulate the signal field over a set of subcarriers corresponding to the wireless communication standard.
21. The wireless communications device according to claim 19 , wherein the one or more processors are configured to generate an acknowledgement sub-field for the signal field.
22. The wireless communications device according to claim 19 , wherein the one or more processors are configured to generate that signal field having a length of approximately 26 bits to approximately 30 bits.
23. The wireless communications device according to claim 19 , wherein the one or more processors are configured to arrange the at least one bit according to the wireless communication standard and a legacy communication standard.
24. The wireless communications device according to claim 23 , wherein the wireless communication standard is 802.11n and the legacy communication standard is one or more of the following: 802.11, 802.11a, 802.11b, and 802.11g.
25. The wireless communications device according to claim 19 , wherein the wireless communications device supports 802.11n communications.
26. The wireless communications device according to claim 19 , wherein the wireless communications device supports cellular communications.
27. The wireless communications device according to claim 19 , wherein the wireless communications device is a cellular phone.
28. The wireless communications device according to claim 19 , wherein the wireless communications device supports Bluetooth communications.
29. The wireless communications according to claim 19 , wherein the wireless communications device supports one or more of the following: global system for mobile communications (GSM), code division multiple access (CDMA), and wireless local area network.
30. The wireless communications according to claim 19 , wherein the wireless communications device supports orthogonal frequency division multiplexing.