Common-mode partitioning of wideband channels
Certain aspects of the present disclosure relate to a method for allocating a plurality of logical channels within each wideband channel specified by the IEEE 802.15.3c standard. Each logical channel can utilize the same wideband channel, but the logical channel can also utilize a narrowband channel (i.e., a low data rate (LDR) channel) for control and signaling. The logical channel may function as a common mode channel for multi-mode operations. A piconet controller (PNC) within a piconet can utilize the LDR for beaconing, association, and for assigning Channel Time Allocations (CTAs). Inside a CTA period, multiple devices in the piconet can communicate using a single-carrier mode, an OFDM mode, or some other mode.
1. A method for wireless communications, comprising:
utilizing a wideband channel for communicating data within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
utilizing a narrowband sub-channel encompassed by the wideband channel for communicating control information, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.
2. The method of claim 1 , wherein each narrowband sub-channel from a plurality of narrowband sub-channels encompassed by the wideband channel is dedicated for use by a unique piconet.
3. The method of claim 1 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
utilizing the narrowband sub-channel comprises utilizing the logical channel by a piconet controller (PNC) in the first piconet for beaconing, association, channel time allocations (CTAs) and communicating Media Access Control (MAC) command messages.
4. The method of claim 1 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
utilizing the narrowband sub-channel comprises utilizing the logical channel by a device in the first piconet for association, requesting a channel time allocation (CTA) period and signaling with a piconet controller (PNC) in the first piconet.
5. The method of claim 4 , wherein utilizing the logical channel by the device comprises communicating with another device in the first piconet inside the CTA period using a single-carrier mode.
6. The method of claim 4 , wherein utilizing the logical channel by the device comprises communicating with another device in the first piconet inside the CTA period using an Orthogonal Frequency Division Multiplexing (OFDM) mode.
7. The method of claim 1 , wherein
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
utilizing the narrowband sub-channel comprises transmitting a frame over the logical channel, the frame comprising a preamble sequence, a header and signaling data.
8. The method of claim 7 , wherein the preamble sequence comprises a channel estimation sequence (CES), a start frame delimiter (SFD), and a synchronization (SYNC) sequence.
9. The method of claim 8 , wherein the SFD sequence and the SYNC sequence are spread by spreading codes.
10. The method of claim 7 , wherein the header and the signaling data are spread by a spreading code.
11. The method of claim 7 , wherein the header and the signaling data are encoded using a block code.
12. The method of claim 1 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises five narrowband sub-channels; and
each narrowband sub-channel has a separation within the wideband channel of approximately 432 MHz.
13. The method of claim 1 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises three narrowband sub-channels; and
each narrowband sub-channel has a 3 dB bandwidth of approximately 216 MHz.
14. An apparatus for wireless communications, comprising:
a circuit configured to utilize a wideband channel for communicating data within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
a circuit configured to utilize a narrowband sub-channel encompassed by the wideband channel for communicating control information, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.
15. The apparatus of claim 14 , wherein each narrowband sub-channel from a plurality of narrowband sub-channels encompassed by the wideband channel is dedicated for use by a unique piconet.
16. The apparatus of claim 14 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
the circuit configured to utilize the narrowband sub-channel comprises a circuit configured to utilize the logical channel by the apparatus in the first piconet for beaconing, association, channel time allocations (CTAs) and communicating Media Access Control (MAC) command messages.
17. The apparatus of claim 14 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
the circuit configured to utilize the narrowband sub-channel comprises a circuit configured to utilize the logical channel by the apparatus in the first piconet for association, requesting a channel time allocation (CTA) period and signaling with a piconet controller (PNC) in the first piconet.
18. The apparatus of claim 17 , wherein the circuit configured to utilize the logical channel by the apparatus comprises a circuit configured to communicate with another apparatus in the first piconet inside the CTA period using a single-carrier mode.
19. The apparatus of claim 17 , wherein the circuit configured to utilize the logical channel by the apparatus comprises a circuit configured to communicate with another apparatus in the first piconet inside the CTA period using an Orthogonal Frequency Division Multiplexing (OFDM) mode.
20. The apparatus of claim 14 , wherein
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
a circuit configured to utilize the narrowband sub-channel comprises a transmitter configured to transmit a frame over the logical channel, the frame comprising a preamble sequence, a header and signaling data.
21. The apparatus of claim 20 , wherein the preamble sequence comprises a channel estimation sequence (CES), a start frame delimiter (SFD), and a synchronization (SYNC) sequence.
22. The apparatus of claim 21 , wherein the SFD sequence and the SYNC sequence are spread by spreading codes.
23. The apparatus of claim 20 , wherein the header and the signaling data are spread by a spreading code.
24. The apparatus of claim 20 , wherein the header and the signaling data are encoded using a block code.
25. The apparatus of claim 14 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises five narrowband sub-channels; and
each narrowband sub-channel has a separation within the wideband channel of approximately 432 MHz.
26. The apparatus of claim 14 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises three narrowband sub-channels; and
each narrowband sub-channel has a 3 dB bandwidth of approximately 216 MHz.
27. An apparatus for wireless communications, comprising:
means for utilizing a wideband channel for communicating data within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
means for utilizing a narrowband sub-channel encompassed by the wideband channel for communicating control information, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.
28. The apparatus of claim 27 , wherein each narrowband sub-channel from a plurality of narrowband sub-channels encompassed by the wideband channel is dedicated for use by a unique piconet.
29. The apparatus of claim 27 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
the means for utilizing the narrowband sub-channel comprises means for utilizing the logical channel by the apparatus in the first piconet for beaconing, association, channel time allocations (CTAs) and communicating Media Access Control (MAC) command messages.
30. The apparatus of claim 27 , wherein:
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
the means for utilizing the narrowband sub-channel comprises means for utilizing the logical channel by the apparatus in the first piconet for association, requesting a channel time allocation (CTA) period and signaling with a piconet controller (PNC) in the first piconet.
31. The apparatus of claim 30 , wherein the means for utilizing the logical channel by the apparatus comprises means for communicating with another apparatus in the first piconet inside the CTA period using a single-carrier mode.
32. The apparatus of claim 30 , wherein the means for utilizing the logical channel by the apparatus comprises means for communicating with another apparatus in the first piconet inside the CTA period using an Orthogonal Frequency Division Multiplexing (OFDM) mode.
33. The apparatus of claim 27 , wherein
the narrowband sub-channel encompassed by the wideband channel comprises a logical channel; and
the means for utilizing the narrowband sub-channel comprises means for transmitting a frame over the logical channel, the frame comprising a preamble sequence, a header and signaling data.
34. The apparatus of claim 33 , wherein the preamble sequence comprises a channel estimation sequence (CES), a start frame delimiter (SFD), and a synchronization (SYNC) sequence.
35. The apparatus of claim 34 , wherein the SFD sequence and the SYNC sequence are spread by spreading codes.
36. The apparatus of claim 33 , wherein the header and the signaling data are spread by a spreading code.
37. The apparatus of claim 33 , wherein the header and the signaling data are encoded using a block code.
38. The apparatus of claim 27 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises five narrowband sub-channels; and
each narrowband sub-channel has a separation within the wideband channel of approximately 432 MHz.
39. The apparatus of claim 27 , wherein:
the wideband channel has a bandwidth of approximately 2160 MHz and comprises three narrowband sub-channels; and
each narrowband sub-channel has a 3 dB bandwidth of approximately 216 MHz.
40. A tangible computer-readable storage medium encoded with instructions executable to:
utilize a wideband channel for communicating data within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
utilize a narrowband sub-channel encompassed by the wideband channel for communicating control information, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.
41. An access point, comprising:
at least one antenna;
a transmitter configured to utilize a wideband channel for transmitting data via the at least one antenna within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
a circuit configured to utilize a narrowband sub-channel encompassed by the wideband channel for transmitting control information via the at least one antenna, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.
42. An access terminal, comprising:
at least one antenna;
a receiver configured to utilize a wideband channel for receiving data via the at least one antenna within a first piconet, wherein the wideband channel is allocated for use by a plurality of piconets comprising the first piconet; and
a circuit configured to utilize a narrowband sub-channel encompassed by the wideband channel for receiving control information via the at least one antenna, wherein the narrowband sub-channel is dedicated for communicating control information in the first piconet.