HE SIG B Common Field Formats and Indication

• US 20170070998A1
• Filed: 09/07/2016
• Published: 03/09/2017
• Est. Priority Date: 09/07/2015
• Status: Active Application

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Hu, Shengquan, Wu, Tianyu, Liu, Jianhan, PARE, Thomas Edward Jr.
• Granted Patent: US 10,264,580 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

Methods and apparatus are provided for HE-SIG-B common field formats and indications. In one novel aspect, a fixed format is used for HE-SIG-B common field indicating resource allocations (RA). In one embodiment, look-up tables (LUT) are configured for the resource allocation and indicated in the HE-SIG-B common field. In one embodiment, one or more RA LUTs are used based on the operation bandwidth. The RA LUTs are placed in an order of channel indexes from lower channel to upper channel signaled in each corresponding RA LUT. In another novel aspect, MU-MIMO is used for operation bandwidth of 160 MHz and a compression indicator is set in the HE-SIG-A field indicating a saving of all RA LUTS in the HE-SIG-B common field. In yet another novel aspect, a one-bit middle-tone indicator is included in the HE-SIG-B common field indicating whether the one or more middle 26 tone is used.

Claims

1. A method, comprising:

(a) obtaining resource allocation (RA) information by a station (STA) in an OFDMA wireless network, wherein the RA information is indicated in a HE-SIG-B common field and user specific field, and wherein the HE-SIG-B common field for RA is with a fixed format;

(b) determining an operation bandwidth(BW), wherein the operation bandwidth is partitioned into predefined resource units, and wherein different operation bandwidth is partitioned into one or more HE-SIG-B channels, and wherein each HE-SIG-B channel represents a 20 MHz resource block;

(c) determining a resource allocation using a RU look-up table (LUT) based on the RA information.

d) compressing the HE-SIG-B common field for full BW MU-MIMO packets; and

e) determining the existence of user specific field for middle 26 tone RU of a 80 Mhz channel.

2. The method of claim 1, further comprising:

determining a resource unit (RU) size scheduled for the STA and the determining of the resource allocation in (c) is further based on the RU size.

3. The method of claim 1, wherein the HE-SIG-B common field is defined with the fixed format of one RU LUT for 20 MHz operation bandwidth, one RU LUT on each HE-SIB-B channels for 40 MHz operation bandwidth with two HE-SIG-B channels, two RU LUTs on each HE-SIG-B common field for 80 MHz operation bandwidth with two HE-SIG-B channels, and four RU LUTs on each HE-SIG-B common field for 160 MHz operation bandwidth with two HE-SIG-B channels, and wherein in each HE-SIG-B common field, the RU LUTs are placed in an order of channel indices signaled in each corresponding RU LUT.

4. The method of claim 3, wherein RA LUTs are placed in an order of corresponding channel index from lower channel to upper channel.

5. The method of claim 3, wherein the operation bandwidth is greater than 20 MHz, and wherein HE-SIB-B channel 1 is duplicated on all odd numbered 20 Mhz channels and HE-SIB-B channel 2 is duplicated on all even numbered 20 mhz channels.

6. The method of claim 3, wherein RU LUTs on HE-SIG-B channel 1 contain RA information for all RUs whose subcarrier indices overlap the odd numbered 20 Mhz channels and RU LUTs on HE-SIG-B channel 2 contain RA information for ALL RUs whose subcarrier indices overlap the even numbered 20 Mhz channels.

7. The method of claim 1, wherein a full BW MU-MIMO is configured for the whole operation bandwidth, and wherein a one-bit compression indicator is set in a HE-SIG-A field indicating a saving of the HE-SIG-B common field.

8. The method of claim 1, a one-bit middle RU indicator is included in the HE-SIG-B common field indicating whether the middle 26 tone RU of an 80 Mhz is allocated.

9. The method of claim 8, wherein the operation bandwidth is 80 MHz and the one-bit middle RU indicator is duplicated on common field of both HE-SIG-B channels.

10. The method of claim 8, wherein the operation bandwidth is 80 MHz and the middle RU indicator is set to 1, the user specific field for the middle 26 tone RU of 80 Mhz channel is placed on a fixed HE-SIG-B channel.

11. The method of claim 8, wherein the operation bandwidth is 80 MHz and the middle RU indicator is set to 1, the user specific field for the middle 26 tone RU of 80 Mhz channel is placed on HE-SIG-B channel with smaller number of signaling bits.

12. The method of claim 8, wherein the operation bandwidth is 160 MHz, and wherein the middle RU indicator for middle 26 tone RU of lower 80 MHz is included in common field of HE-SIG-B channel 1 and the middle RU indicator for middle 26 tone RU of upper 80 MHz is included in common field of HE-SIG-B channel 2.

13. The method of claim 8, wherein the operation bandwidth is 160 MHz, and wherein the user specific field for middle 26 tone RU of lower 80 Mhz is placed at the end of HE-SIG-B channel 1 and the user specific field of middle 26 tone RU of upper 80 MHz is placed at the end of HE-SIG-B channel 2.

14. A station (STA), comprising:

a radio frequency (RF) transceiver that transmits and receives wireless signals in a wireless network;

a HE-SIG-B decoding circuit that obtains resource allocation (RA) information by a station (STA) in a OFDMA wireless network, wherein the RA information is indicated in a HE-SIG-B common field and a user specific field, and wherein the HE-SIG-B common field for RA is with a fixed format;

a bandwidth detection circuit that determines an operation bandwidth, wherein the operation bandwidth is partitioned into predefined resource units, and wherein different operation bandwidth is partitioned into one or more HE-SIG-B channels, and wherein each HE-SIG-B channel represents a 20 MHz resource block;

a resource allocation circuit that determines a resource allocation using a RA look-up table (LUT) based on the RA information;

a common field compressing circuit that compresses the HE-SIG-B common field for full BW MU-MIMO packets; and

a middle RU handling circuit that determines the existence of user specific field for middle 26 tone RU of a 80 Mhz channel.

15. The STA of claim 14, further comprising:

a RU size detecting circuit that determines a resource unit (RU) size scheduled for the STA and the determines of the resource allocation is further based on the RU size.

16. The STA of claim 14, wherein the HE-SIG-B common field is defined with the fixed format of one RU LUT for 20 MHz operation bandwidth, one RU LUT on each HE-SIB-B channels for 40 MHz operation bandwidth with two HE-SIG-B channels, two RU LUTs on each HE-SIG-B common field for 80 MHz operation bandwidth with two HE-SIG-B channels, and four RU LUTs on each HE-SIG-B common field for 160 MHz operation bandwidth with two HE-SIG-B channels, and wherein in each HE-SIG-B common field, the RU LUTs are placed in an order of channel indices signaled in each corresponding RU LUT.

17. The STA of claim 16, wherein RA LUTs are placed in an order of corresponding channel index from lower channel to upper channel.

18. The STA of claim 16, wherein the operation bandwidth is greater than 20 MHz, and wherein HE-SIB-B channel 1 is duplicated on all odd numbered 20 Mhz channels and HE-SIB-B channel 2 is duplicated on all even numbered 20 mhz channels.

19. The STA of claim 16, wherein RU LUTs on HE-SIG-B channel 1 contain RA information for all RUs whose subcarrier indices overlap the odd numbered 20 mhz channels and RU LUTs on HE-SIG-B channel 2 contain RA information for ALL RUs whose subcarrier indices overlap the even numbered 20 Mhz channels.

20. The STA of claim 14, wherein a full BW MU-MIMO is configured for the whole operation bandwidth, and wherein a one-bit compression indicator is set in a HE-SIG-A field indicating a saving of the HE-SIG-B common field.

21. The STA of claim 14, a one-bit middle RU indicator is included in the HE-SIG-B common field indicating whether the middle 26 tone RU of an 80 Mhz is allocated.

22. The STA of claim 21, wherein the operation bandwidth is 80 MHz and the 1 bit middle RU indicator is duplicated on common field of both HE-SIG-B channels.

23. The STA of claim 21, wherein the operation bandwidth is 80 MHz and the middle RU indicator is set to 1, the user specific field for the middle 26 tone RU of 80 Mhz channel is placed on a fixed HE-SIG-B channel, for example at the end of HE-SIG-B channel 1.

24. The STA of claim 21, wherein the operation bandwidth is 80 MHz and the middle RU indicator is set to 1, the user specific field for the middle 26 tone RU of 80 Mhz channel is placed on HE-SIG-B channel with smaller number of signaling bits.

25. The STA of claim 21, wherein the operation bandwidth is 160 MHz, and wherein the middle RU indicator for middle 26 tone RU of lower 80 MHz is included in common field of HE-SIG-B channel 1 and the middle RU indicator for middle 26 tone RU of upper 80 MHz is included in common field of HE-SIG-B channel 2.

26. The STA of claim 21, wherein the operation bandwidth is 160 MHz, and wherein the user specific field for middle 26 tone RU of lower 80 Mhz is placed at an end of HE-SIG-B channel 1 and the user specific field of middle 26 tone RU of upper 80 MHz is placed at an end of HE-SIG-B channel 2.