Wireless Communication Signaling for Aggregate Data Units

• US 20110134816A1
• Filed: 12/09/2010
• Published: 06/09/2011
• Est. Priority Date: 12/09/2009
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Ho, Ken Kinwah, Zhang, Hongyuan, Liu, Yong, Ramamurthy, Harish, Banerjea, Raja
• Granted Patent: US 8,503,367 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Systems and techniques relating to wireless communications are described. A described technique includes obtaining data for a transmission to a wireless communication device. The wireless communication device can be configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units. The technique includes, in a physical (PHY) frame, an aggregate data unit that is based on the data and the aggregate data unit format, the aggregate data unit including a single MAC data unit. The technique includes, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement.

Claims

1. A method, comprising:

obtaining data for a transmission to a wireless communication device, wherein the wireless communication device is configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units;

including, in a physical (PHY) frame, an aggregate data unit that is based on i) the data and ii) the aggregate data unit format, wherein the aggregate data unit includes a single MAC data unit;

including, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement; and

transmitting the PHY frame to the wireless communication device.

2. The method of claim 1, wherein including the indication comprises including, in a PHY signaling field of the PHY frame, information to indicate that the MAC data unit in the aggregate data unit is singular.

3. The method of claim 1, wherein including the indication comprises including, in a MAC header of the aggregate data unit, information to indicate that the MAC data unit in the aggregate data unit is singular.

4. The method of claim 1, wherein including the indication comprises including, in a delimiter of a subframe of the aggregate data unit, information to indicate that the MAC data unit in the aggregate data unit is singular, wherein the subframe includes the MAC data unit.

5. The method of claim 1, wherein

obtaining the data comprises receiving management data, and

the aggregate data unit is indicative of a management frame, wherein the management frame requires an acknowledgement from the wireless communication device.

6. The method of claim 1, wherein

the wireless communication device is a first wireless communication device,

the aggregate data unit is a first aggregate data unit,

obtaining the data comprises obtaining data for transmission to a second wireless communication device in a second aggregate data unit,

transmitting the PHY frame comprises transmitting, in a Space Division Multiple Access (SDMA) frame that contains the PHY frame, a first spatially steered frame and a second spatially steered frame that concurrently and respectively provide the first aggregate data unit to the first wireless communication device and the second aggregate data unit to the second wireless communication device, and

an end of the first spatially steered frame and an end of the second spatially steered frames are aligned to have a same length.

7. The method of claim 6, further comprising:

causing the first wireless communication device to send a first acknowledgement in response to the first aggregate data unit including the single MAC data unit; and

causing the second wireless communication device to send a second acknowledgement in response to the second aggregate data unit, wherein the second acknowledgement is a block acknowledgement that is in accordance with a block acknowledgement agreement established with the second wireless communication device.

8. The method of claim 7, further comprising:

limiting the SDMA frame to have a single aggregate data unit without a corresponding block acknowledgement agreement, wherein the first acknowledgement is sent based on a predetermined duration after an end of the SDMA frame, and wherein the block acknowledgement is sent based on an explicit poll.

9. The method of claim 7, further comprising:

including, in the SDMA frame, an additional aggregate data unit without a corresponding block acknowledgement agreement, for a third wireless communication device, wherein the additional aggregate data unit includes a single MAC data unit for the third wireless communication device; and

causing the third wireless communication device to send a third acknowledgement in response to the additional aggregate data unit including the single MAC data unit for the third wireless communication device,

wherein causing the first wireless communication device to send the first acknowledgement comprises transmitting a first explicit poll to the first communication device, and

wherein causing the third wireless communication device to send the third acknowledgement comprises transmitting a second explicit poll to the third communication device.

10. The method of claim 1, wherein

the MAC data unit is a single MAC protocol data unit (MPDU),

the aggregate data unit is an aggregated MPDU (A-MPDU),

the A-MPDU contains an A-MPDU subframe that includes a delimiter indicating a singular presence of the single MPDU in the A-MPDU, and the single MPDU, and

the method further comprises

selectively including, in the A-MPDU subframe, a pad based on a 32-bit boundary,

selectively including, in the A-MPDU, one or more padding delimiters after the A-MPDU subframe, wherein each of the one or more padding delimiters are four octets in length and indicate a MPDU length of zero, and

selectively including, in the A-MPDU, a MAC pad, wherein the MAC pad is an integer number of octets in length, which is less than four octets.

11. An apparatus comprising:

circuitry to access a wireless communication interface; and

processor electronics configured to

obtain data for a transmission to a wireless communication device, wherein the wireless communication device is configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units,

include, in a physical (PHY) frame, an aggregate data unit that is based on i) the data and ii) the aggregate data unit format, wherein the aggregate data unit includes a single MAC data unit,

include, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement, and

cause a transmission the PHY frame to the wireless communication device via the wireless communication interface.

12. The apparatus of claim 11, wherein the indication is included in a PHY signaling field of the PHY frame to indicate that the MAC data unit in the aggregate data unit is singular.

13. The apparatus of claim 11, wherein the indication is included in a MAC header of the aggregate data unit to indicate that the MAC data unit in the aggregate data unit is singular.

14. The apparatus of claim 11, wherein the indication is included in a delimiter of a subframe of the aggregate data unit to indicate that the MAC data unit in the aggregate data unit is singular, wherein the subframe includes the MAC data unit.

15. The apparatus of claim 11, wherein the aggregate data unit is indicative of a management frame that requires an acknowledgement from the wireless communication device.

16. The apparatus of claim 11, wherein

the wireless communication device is a first wireless communication device,

the aggregate data unit is a first aggregate data unit,

obtaining the data comprises obtaining data for transmission to a second wireless communication device in a second aggregate data unit,

the processor electronics are further configured to include, in a Space Division Multiple Access (SDMA) frame that contains the PHY frame, a first spatially steered frame and a second spatially steered frame that concurrently and respectively provide the first aggregate data unit to the first wireless communication device and the second aggregate data unit to the second wireless communication device, and

an end of the first spatially steered frame and an end of the second spatially steered frames are aligned to have a same length.

17. The apparatus of claim 16, wherein the processor electronics are further configured to

cause the first wireless communication device to send a first acknowledgement in response to the first aggregate data unit including the single MAC data unit, and

cause the second wireless communication device to send a second acknowledgement in response to the second aggregate data unit, wherein the second acknowledgement is a block acknowledgement that is in accordance with a block acknowledgement agreement established with the second wireless communication device.

18. The apparatus of claim 17, wherein the processor electronics are further configured to limit the SDMA frame to have a single aggregate data unit without a corresponding block acknowledgement agreement, wherein the first acknowledgement is sent based on a predetermined duration after an end of the SDMA frame, and wherein the block acknowledgement is sent based on an explicit poll.

19. The apparatus of claim 17, wherein the processor electronics are further configured to

include, in the SDMA frame, an additional aggregate data unit without a corresponding block acknowledgement agreement, for a third wireless communication device, wherein the additional aggregate data unit includes a single MAC data unit for the third wireless communication device, and

cause the third wireless communication device to send a third acknowledgement in response to the additional aggregate data unit including the single MAC data unit for the third wireless communication device,

wherein the first wireless communication device sends the first acknowledgement based on receiving a first explicit poll, and

wherein the third wireless communication device sends the third first acknowledgement based on receiving a second explicit poll.

20. The apparatus of claim 11, wherein

the MAC data unit is a single MAC protocol data unit (MPDU),

the aggregate data unit is an aggregated MPDU (A-MPDU),

the A-MPDU contains an A-MPDU subframe that includes a delimiter indicating a singular presence of the single MPDU in the A-MPDU, and the single MPDU, and

the processor electronics are further configured to

selectively include, in the A-MPDU subframe, a pad based on a 32-bit boundary,

selectively include, in the A-MPDU, one or more padding delimiters after the A-MPDU subframe, wherein each of the one or more padding delimiters are four octets in length and indicate a MPDU length of zero, and

selectively include, in the A-MPDU, a MAC pad, wherein the MAC pad is an integer number of octets in length, which is less than four octets.

21. A system comprising:

processor electronics configured to (i) obtain data for a transmission to a wireless communication device, wherein the wireless communication device is configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units, (ii) include, in a physical (PHY) frame, an aggregate data unit that is based on a) the data and b) the aggregate data unit format, wherein the aggregate data unit includes a single MAC data unit, ii) include, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement, and

circuitry to transmit the PHY frame to the wireless communication device.

22. The system of claim 21, wherein the indication is included in i) a PHY signaling field of the PHY frame, ii) a MAC header of the aggregate data unit, or iii) a delimiter of a subframe of the aggregate data unit, the subframe includes the MAC data unit.

23. The system of claim 21, wherein

the wireless communication device is a first wireless communication device,

the aggregate data unit is a first aggregate data unit,

obtaining the data comprises obtaining data for transmission to a second wireless communication device in a second aggregate data unit,

the processor electronics are further configured to include, in a Space Division Multiple Access (SDMA) frame that contains the PHY frame, a first spatially steered frame and a second spatially steered frame that concurrently and respectively provide the first aggregate data unit to the first wireless communication device and the second aggregate data unit to the second wireless communication device, and

an end of the first spatially steered frame and an end of the second spatially steered frames are aligned to have a same length.

24. The system of claim 23, wherein the processor electronics are further configured to

cause the first wireless communication device to send a first acknowledgement in response to the first aggregate data unit including the single MAC data unit, and

cause the second wireless communication device to send a second acknowledgement in response to the second aggregate data unit, wherein the second acknowledgement is a block acknowledgement that is in accordance with a block acknowledgement agreement established with the second wireless communication device.

25. The system of claim 21, wherein

the MAC data unit is a single MAC protocol data unit (MPDU),

the aggregate data unit is an aggregated MPDU (A-MPDU),

the A-MPDU contains an A-MPDU subframe that includes a delimiter indicating a singular presence of the single MPDU in the A-MPDU, and the single MPDU, and

the processor electronics are further configured to

selectively include, in the A-MPDU subframe, a pad based on a 32-bit boundary,

selectively include, in the A-MPDU, one or more padding delimiters after the A-MPDU subframe, wherein each of the one or more padding delimiters are four octets in length and indicate a MPDU length of zero, and

selectively include, in the A-MPDU, a MAC pad, wherein the MAC pad is an integer number of octets in length, which is less than four octets.