BR102015031684A2 - computer readable method, device, and media for signaling high-efficiency packet formats using an inherited portion of the preamble in wireless LANs - Google Patents

Abstract

"Computer-readable method, device, and media for signaling high-efficiency packet formats using an inherited portion of the preamble in wireless local area networks." It is a high-efficiency wireless local area network (hew) device (hew) that includes a circuitry. the circuitry may be configured to generate a he packet comprising an inherited signal field (1-sig) followed by one or more he signal fields, wherein one or more he signal fields include a field he-sig-a, and wherein a modulation and coding scheme (mcs) subfield of the he-sig-a field together signals one mcs and one or more other subfields. one or more other subfields may be a low density parity check (ldpc) or a spatiotemporal block (stbc) coding. the circuitry may be configured to generate lsig to signal to one or more hew devices a first packet format of he packet as a second packet format of he packet, wherein a length of l-sig module 3 is used to signal the first packet format or second packet format.

Description

Report of the Invention Patent for "METHOD, APPARATUS AND COMPUTER-READY MEDIA FOR SIGNING HIGH EFFICIENT PACKAGE FORMATS USING A INHERITED PART OF THE PREAMBLE IN WIRELESS NETWORKS".

FIELD OF TECHNIQUE

[0001] Some embodiments refer to wireless local area network (WLAN) transmission and reception preambles that include networks operating in accordance with the Institute of Electrical and Electronics Engineers (IEEE) family of standards. 802.11. Some embodiments refer to packet signaling (HEW) formats of high efficiency WLANs (HE) in an inherited preamble. Some embodiments concern the use of a modulation and coding scheme (MCS) field of a HEW signal field to jointly signal an MCS and a low density parity check (LDPC) and / or an MCS and a block coding. space-time (STBC).

BACKGROUND

A problem with data communication over a wireless network is the transmission and reception of packets which may include preamble fields. Another problem with data communication over a wireless network is that often more than one standard may be in use in a WLAN. For example, you may need to use IEEE 802.11ax, which may be called HEW or HE, with legacy versions of IEEE 802.11.

Therefore, there are general needs for systems and methods to enable signaling of high efficient packet formats using an inherited portion of the preamble of the packet.

BRIEF DESCRIPTION OF DRAWINGS

The present disclosure is illustrated by way of example rather than limitation in the Figures of the accompanying drawings, in which similar references indicate similar elements and in which: Figure 1 illustrates a WLAN in accordance with certain embodiments;

Figure 2 illustrates a signal constellation that can be used in a signal field to indicate that the following packets may be for 802.11a, in accordance with some embodiments;

Figure 3 illustrates a series of signal constellations which may be used in a signal field to indicate that the following packets may be for ο 802.11η, in accordance with some embodiments;

Figure 4 illustrates a series of signal constellations that may be used in a signal field to indicate that the following packets may be for 802.11ac, in some embodiments;

Figure 5 illustrates an IEEE 802.11a / g package, in accordance with some embodiments;

Figures 6A and 6B illustrate a HE packet with a single user preamble (SU) in which a repeated L-SIG is used to indicate the communication protocol in accordance with some embodiments;

Figure 7 illustrates a HE packet with a multi-user preamble (MU) 703 wherein a repeated L-SIG is used to indicate the communication protocol in accordance with some embodiments;

Figures 8 and 9 illustrate HE-SIG-A format tables according to some embodiments;

Figures 10 and 11 illustrate HE-SIG-A format tables according to some embodiments; and Figure 12 illustrates a HEW device in accordance with exemplary embodiments.

DETAILED DESCRIPTION

The following description and drawings sufficiently illustrate specific embodiments to enable persons skilled in the art to practice the same. Other embodiments may incorporate structural, logical, electrical and process changes and other changes. Portions and features of some modalities may be included, or replaced with those of other modalities. The embodiments set forth in the claims encompass all available equivalents of those claims.

[0016] Figure 1 illustrates a WLAN 100 in accordance with some embodiments. The WLAN may comprise a base service set (BSS) 100 which may include a master station 102, which may be an AP, a plurality of high efficiency wireless (HEW) STAs (e.g. IEEE 802.11ax). and a plurality of legacy devices (e.g., IEEE 802.11n / ac) 106.

Master Station 102 may be an AP using IEEE

802.11 for transmission and reception. Master station 102 may be a base station. Master station 102 may use other communication protocols, such as the IEEE 802.11 protocol. The IEEE 802.11 protocol can be IEEE 802.11ax. The IEEE 802.11 protocol may include the use of OFDMA, time division multiple access (TDMA) and / or code division multiple access (CDMA). The IEEE 802.11 protocol may include a multiple access technique. For example, the IEEE 802.11 protocol may include space division multiple access (SDMA) and / or MU-MIMO.

Legacy devices 106 may operate in accordance with one or more of IEEE 802.11a / g / ag / n / ac, IEEE 802.11-2012, or other legacy wireless communication standards. Legacy devices 106 can be STAs or IEEE STAs.

HEW 104 STAs may be wireless transmitting and receiving devices, for example, mobile phone, handheld wireless device, wireless glasses, wireless watch, wireless personal device, tablet-type computer, or other device. which may be transmitting or receiving using the IEEE 802.11 protocol, for example, IEEE 802.11ax or another wireless protocol. In some embodiments, HEW 104 STAs may be referred to as high efficiency (HE) stations.

The BSS 100 can operate on one primary channel and one or more secondary or subchannel channels. The BSS 100 may include one or more master stations 102. In some embodiments, master station 102 may communicate with one or more of the HEW 104 devices on one or more of the secondary or subchannel channels or the primary channel. . In some embodiments, master station 102 communicates with legacy devices 106 on the primary channel. In some embodiments, master station 102 may be configured to communicate concurrently with one or more of HEW STAs 104 on one or more of the secondary channels and an inherited device 106 that use only the primary channel and do not use any one of the secondary channels.

Master station 102 can communicate with legacy devices 106 in accordance with legacy IEEE 802.11 communication techniques. In exemplary embodiments, master station 102 may also be configured to communicate with HEW STAs 104 in accordance with legacy IEEE 802.11 communication techniques. Inherited IEEE 802.11 communication techniques can refer to any IEEE 802.11 communication technique prior to IEEE 802.11ax.

In some embodiments, a HEW frame may be configurable to have the same bandwidth as a subchannel, and the bandwidth may be one of contiguous 20 MHz, 40 MHz, or 80 MHz, 160 bandwidths. MHz, 320 MHz, or a non-contiguous bandwidth of 80 + 80 MHz (160 MHz). In some embodiments, 1 MHz, 1.25 MHz, 2.0 MHz, 2.5 MHz, 5 MHz AND 10 MHz bandwidths, or a combination thereof or other bandwidth that is less than or equal to Available bandwidth can also be used. A HEW frame can be configured to transmit multiple spatial streams, which may be MU-MIMO compliant.

In other embodiments, master station 102, STA HEW 104 and / or legacy device 106 may also deploy different technologies, for example Code Division Multiple Access (CDMA) 2000, CDMA 2000 1X, CDMA 2000 Optimized Evolution (EV-DO), Interim Standard 2000 (IS-2000), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), Long Term Evolution (LTE), Global System for Mobile Communications (GSM ), GSM Enhanced Data Rate (EDGE), GSM EDGE (GERAN), IEEE 802.16 (ie Worldwide Interoperability for Microwave Access (WíMAX)), BlueTooth®, or other technologies.

Some modalities refer to HEW communications. In accordance with some IEEE 802.11ax modalities, a master station 102 may operate as a master station that may be willing to support wireless media (for example, during a retention period) to receive exclusive control of the media for a period. HEW control In some embodiments, the HEW control period may be referred to as the transmission opportunity (TXOP). Master station 102 may transmit a HEW master-sync transmission, which may be a trigger board or a HEW control and schedule transmission, at the beginning of the HEW control period. Master station 102 can transmit a time duration of TXOP and subchannel information. During the HEW control period, HEW STAs 104 can communicate with master station 102 in accordance with a non-contention based multiple access technique, for example OFDMA or MU-MIMO. This is different from conventional WLAN communications in which devices communicate in accordance with a contention-based communication technique rather than a multiple access technique. During the HEW control period, master station 102 can communicate with HEW stations 104 using one or more HEW frames. During the HEW control period, HEW STAs 104 may operate at a subchannel smaller than the operating range of master station 102. During the HEW control period, inherited stations abstain from communication. According to some embodiments, during master-sync transmission, HEW STAs 104 may support wireless media with legacy devices 106 that are deprived of supporting wireless media during master-synchronization transmission.

In some embodiments, the multiple access technique used during the HEW control period may be a scheduled OFDMA technique, although this is not a requirement. In some embodiments, the multiple access technique may be a time division multiple access (TDMA) technique or a frequency division multiple access (FDMA) technique. In some embodiments, the multiple access technique may be a space division multiple access (SDMA) technique.

Master station 102 can also communicate with legacy stations 106 and / or HEW stations 104 in accordance with legacy IEEE 802.11 communication techniques. In some embodiments, master station 102 may also be configurable to communicate with HEW stations 104 outside the HEW control period in accordance with legacy IEEE 802.11 communication techniques, although this is not a requirement.

In exemplary embodiments, master station 102 and / or HEW device 104 are configured to perform one or more of the functions and / or methods described herein in combination with Figures 1 to 12, for example generating an L-SIG to indicate an HE packet format or configuration or detect that an L-SIG indicates an HE packet format or configuration. Additionally, master station 102 and / or HEW device 104 may be configured to encode additional format or configuration information in the MCS field and / or using tail bits.

Figure 2 illustrates a signal constellation 200 that may be used in a signal field to indicate that the following packets may be for 802.11a, in accordance with some embodiments. The horizontal geometry axis may be a phase (I) portion 204 of a received signal field, and the vertical geometry axis may be a quadrature portion (Q) 202 of the received signal field. The amplitude and phase shift of the received signal field encode information. Points 206, 208 indicate the phase and amplitude combinations received from symbols 0 210 and 1 212, respectively. The power may be measured along the geometric axis I 204 and along the geometric axis Q 202. A greater power along the geometric axis I 204 may indicate that the signal field is for 802.11a.

HEW 104 devices can use signal constellation 200 to determine the geometric axes I 204 and Q 202. HEW 104 devices can use signal constellation 200 to determine that a packet is an 802.11a packet to defer use. wireless media based on an 802.11a packet length and duration. HEW 104 devices can determine the use of the 802.11a standard based on the reception of signal constellation 200.

Figure 3 illustrates a series 300 of signal constellations 300, 360, 390 that may be used in a signal field to indicate that the following packets may be for ο 802.11η, in accordance with some embodiments. Signal constellations 330, 360, 390 may be similar to the signal constellation in Figure 2. In the first signal constellation 330, points 302, 304 are arranged along the geometric axis I 204. In the second signal constellation 360, the Points 306, 310 indicate amplitude and phase combinations received from 0 308 and 1 312, respectively. Points 306, 310 are arranged along vertical geometric axis 202. In the third signal constellation 390, points 314, 316 indicate amplitude and phase combinations received from symbols 0 308 and 1 312. Points 314, 316 are arranged along the vertical geometry axis 202. Power can be measured along the geometric axes I 204 and along the geometric axes Q 202. The first constellation 330 can be used to determine the geometric axis I 204 and the geometric axis Q 202. A higher power on the Q axis 202 for the second constellation 360 and a higher power on the Q 202 axis for the third constellation 390 and may indicate that the signal fields may be for ο 802.11η. The first constellation 330 may be a signal field. The second and third constellations 360, 390 may be high throughput (HT) signal fields.

Inherited devices 106 operating in accordance with 802.11a may not be able to interpret signal constellation 360 as it is rotated. The first constellation 330 may be a signal field that includes a length field and a rate. Inherited devices 106 then defer all the time indicated by length and rate. Legacy devices 106 operating in accordance with 802.11η can then set the length and rate fields of first constellation 330 for the entire duration of 802.11 transmission. In this way, legacy devices 106 operating in accordance with 802.11η can recognize second constellation 360 as an HT signal field and third constellation 390 as an HT signal field and can defer legacy devices 106 operating on 802.11a compliance.

HEW 104 devices may use signal constellations 330, 360, and / or 390 to determine that a packet is an 802.11η packet and may defer the use of wireless media based on a duration and a length of time. 802.11η package, although the scope of the modalities is not limited to this aspect. HEW 104 devices can determine the use of the 802.11η standard based on the reception of signal constellations 330, 360, 390, although the scope of the modalities is not limited to this aspect.

Figure 4 illustrates a 400 series of signal constellations 430, 460, 490 that can be used in a signal field to indicate that the following packets can be for 802.11 ac, in accordance with some embodiments. Signal constellations 430, 460, 490 may be similar to the signal constellation in Figure 2. In the first signal constellation 430, points 402, 404 are disposed along the geometric axis I 204. In the second signal constellation 460, the points 406, 408 indicate the received amplitude and phase combinations of the symbols 0 410 and 1,412, respectively, and points 406, 408 are arranged along the geometric axis I 204. In the third signal constellation 490, points 418, 414 indicate the amplitude and phase combinations received from symbols 0 420 and 1 416, respectively, and points 414, 416 are arranged along the geometric axis Q 202. Power can be measured along the geometric axes I 204 and the along the geometric axes Q 202. The first constellation 430 can be used to determine the geometric axis I 204 and the geometric axis Q 202. A larger power on the geometric axis I 202 for the second constellation 460 and a power larger on the geometric axis Q 202 to the third constellation 490 and may indicate that the signal fields may be for 802.11 ac. The first constellation 430 may be a signal field. The second and third constellations 460, 490 may be very high transfer rate (VHT) signal fields, which may be called SIG-A and SIG-B.

Inherited devices 106 operating in accordance with 802.11a may not be able to interpret signal constellation 490 as it is rotated. The first constellation 430 may be a signal field that includes a length field and a rate. Inherited devices 106 operating in accordance with 802.11a will defer any time indicated by the length and rate in the first constellation 430. Inherited devices 106 operating in compliance with 802.11n will recognize that the second constellation 460 is not rotated. , then, is not a signal field for ο 802.11η. Inherited devices 106 operating in accordance with ο 802.11η will then defer all the time indicated by the length and rate in the first constellation 430.

Legacy devices 106 operating in accordance with 802.11ac can then set the length and rate fields of the first constellation 430 for the entire duration of 802.11 ac transmission. In this way, legacy devices 106 operating in accordance with 802.11 ac can recognize second constellation 460 as a VHT signal field and third constellation 490 as a VHT signal field and can defer legacy devices 106 operating in VHT signal. 802.11a and 802.11n compliance.

HEW 104 devices can use the 430, 460, and / or 490 signal constellations to determine that a packet is an 802.11ac packet and may defer the use of wireless media based on a duration and a length of time. 802.11 ac package, although the scope of modalities is not limited to this aspect. HEW 104 devices can determine to use the 802.11 ac standard based on the reception of signal constellations 430, 460, 490, although the scope of the modalities is not limited to this aspect.

Figure 5 illustrates an IEEE 802.11a / g 500 package, in accordance with some embodiments. The IEEE 802.11 a / g 500 packet can be a physical layer convergence procedure (PLCP) protocol data unit (PPDU). The inherited short training field (L-STF) 502, the inherited short training field (L-LTF) 504, the inherited signal field (L-SIG) 506, and data 508 are illustrated in Figure 5. STF 502 and L-LFT 504 may be inherited fields to train receiving legacy device 106, HEW device 104 and / or master station 102. L-SIG 506 may be an inherited field indicating that communication is IEEE 802.11 a / g. The L-SIG 506 may indicate that the communication protocol is IEEE 802.11 a / g as described in combination with Figures 2 to 4. Legacy devices 106, HEW stations 104 and / or master stations 102 may be configured. to determine that packet 500 is an IEEE 802.11 a / g format based on L-STF 502, L-LTF 504, and L-SIG 506. Data 508 may be data that may include additional packet formats.

Figures 6A and 6B illustrate an HE packet of 600, 650, respectively, a single user preamble (SU) 603 in which a repeated L-SIG is used to indicate the communication protocol in accordance with some embodiments. . L-STF 602, L-LTF 604, L-SIG 606, L-SIG 608, high-efficiency signal field A (HE-SIG-A) 610, one second are shown in Figures 6A and 6B. HE-SIG-A 611 (Figure 6B), the High Efficiency Short Training Field (HE-STF) 612 and the 614 data. The HE 600, 650 packet communication protocol, which can be IEEE 802.11ax, can be indicated by two L-SIGs 606, 608. In some embodiments, the communication protocol, which may be IEEE 802.11ax, may be indicated differently.

HEW devices 104 and master stations 102 may be configured to determine that the packet is a packet of HE 600, 650 based on repeated L-SIGs 606, 608. In some embodiments, HEW 104 devices and Master stations 102 can be configured to determine that the package is a HE 600, 650 package based on a different manner. The preamble of SU 603 may include L-STF 602, L-LTF 604, L-SIG 606, L-SIG 608, HE-SIG-A 610 and HE-STF 612. Inherited portion 605 of Preamble of SU 603 may be L-STF 602, L-LTF 604, L-SIG 606 and L-SIG 608.

The HE-SIG-A 610 can be two symbols, according to some embodiments. HE-SIG-A 610 may include information indicating a common packet format for both a SU 603 preamble and a MU 703 preamble (Figure 7) for HE 600, 700 packets, for example, a BSS color. , a bandwidth (BW), a cyclic redundancy code (CRC) and tail bits. The HE-SIG-A 610 may also include information that indicates a modulation and coding scheme (MSC) for a HE-SIG-B that may be included in some HE 600, 650 packages. In some embodiments, HE-SIG -A 610 may include information indicating a number of symbols on a HE-SIG-B and a guard range used by the HE-SIG-B.

[0041] As shown in Figure 6B, HE-SIG-A 611 may be a second symbol of HE-SIG-A 610. In some embodiments, HE-SIG-A 611 is a repeat of HE-SIG-A 610. In some embodiments, HE-SIG-A 611 is not included in the HE 600, 650 package.

A HEW device 104 and / or a master station 102 may be able to more quickly decode a packet 600, 650,700 if the packet format is signaled in the inherited portion 605 of the preamble 603, 703. In some embodiments, the packet 600, 650 with an SU preamble can include a HE SIG-G field.

[0043] Figure 7 illustrates a HE 700 packet with a multi-user preamble (MU) 703 in which a repeated L-SIG is used to indicate the communication protocol in accordance with some embodiments. L-STF 702, L-LTF 704, L-SIG 706, L-SIG 708, HE-SIG-A 710, HE-SIG-B 711, HE-STF 712 are shown in Figure 7. and data 714. The HE 700 package can be an IEEE 802.11ax. The HE 700 packet communication protocol, which may be IEEE 802.11ax, may be indicated by two L-SIGs 706, 708. In some embodiments, the communication protocol, which may be IEEE 802.11ax, may be indicated by a different way. HEW devices 104 and master stations 102 can be configured to determine that the packet is a HE 700 packet based on repeated L-SIGs 706, 708. The preamble of MU 703 may include L-STF 702, L -LTF 704, L-SIG 706, L-SIG 708, HE-SIG-A 710, HE-SIG-A 711, and HE-STF 712. The inherited portion 705 of the preamble of MU 703 may be the L-STF 702, L-LTF 704 eoL-SIG 706.

The HE-SIG-A 710 can be two symbols, according to some embodiments. HE-SIG-A 710 may include information indicating a common packet format for both an SU 603 preamble (Figure 6) and a MU 703 preamble for HE 600, 700 packets, for example, a BSS color. , a bandwidth (BW), a cyclic redundancy code (CRC) and tail bits. The HE-SIG-A 710 may also include information indicating a modulation and coding scheme (MSC) for a HE-SIG-B that may be included in some HE 700 packages. In some embodiments, HE-SIG-A 710 may include information indicating a number of HE-SIG-B 711 symbols and a guard interval used by the HE-SIG-B.

A HEW device 104 and / or a master station 102 may be able to more quickly decode a packet 600, 700 if the packet format is signaled in the inherited portion 705 of the preamble 603, 703.

Referring to Figures 6 and 7, the inherited portion 605, 705 may indicate a packet format for the HE 600, 650, 700 pack. For example, L-SIG 606, 706 may include a length 607, 707. The length of L-SIG 606, 706 may need to be zero (mod 3) for legacy device 106, HEW devices 104, and master devices 102 to identify the communication protocol as IEEE 802.11 ac. Legacy devices 106 will defer whatever the length field indicates in L-SIG 606, 706. Length field 607, 707 may be used to signal a packet format of HE 600, 650, 700. For example, the length 607, 707 (mod 3) = 1 may indicate that the HE 600, 650, 700 package is a HE 600, 650, 700 package with a preamble of SU 603, 703. Referring to Figure 7, the length 707 (mod 3) = 2 may indicate that the HE 700 package is a HE 700 package with a preamble of MU 703.

In some embodiments, the length field 607, 707 may be used to signal both an internal and external preamble format. Both internal and external preamble format may indicate a guard interval for the HE-SIG-B 711. Both internal and external preamble format may indicate a symbol size for a long HE (HE-LTF) training field. .

In some embodiments, the inherited preamble 605, 705 may indicate two or more packet formats. For example, length 607, 707 may be used to indicate whether the packet format is an SU format or a MU format, and a polarity of a repeated L-SIG 608,708 may be used to indicate whether the packet format is Package is an internal format or an external format. In some embodiments, different portions of the inherited preamble 605, 705 may be used to indicate different packet formats.

Figures 8 and 9 illustrate tables 800, 900, respectively, of the HE-SIG-A format according to some embodiments. Figures 8 and 9 are described combined together. In some embodiments, HE-SIG-A can have two formats, either a SU 802, 902 format or a MU 804, 904 format. In some embodiments, the HE-SIG-A format is signaled in the inherited preamble 605, 705. Both SU 802, 902 format and MU 804, 904 format may include a bandwidth (BW), BSS color, CRC and tail. The BW may be two bits and may indicate a bandwidth. The BSS color can be from four to six bits and can be an identifier of a BSS. A color of 6-bit BSS is illustrated in Figure 8 and 4-bit BSS in Figure 9.

Two additional fields are illustrated in Figure 9, an indication of whether low intensity parity checking (LDPC) is used and an indication of whether space-time block coding (STBC) is used. In some embodiments, two bits may be used to indicate an STBC configuration. In some embodiments, the indication of whether LDPC is used also indicates whether binary convolution coding (BCC) is used.

The CRC can be four bits. The tail can be six bits and can be the bits to unwind the convolution code. The SU 802, 902 format may include multiple spatial streams (NSTS), MCS, and beamforming. NSTS, which can be three bits, can indicate multiple spatial streams. The four-bit MCS may be an indication of the modulation and coding scheme (MCS) used to encode a remaining portion of the packet.

The MU 804, 904 format may include a number of symbols (NSYM) for HE-SIG-B 711 and MCS for HE-SIG-B 711. NSYM can be three bits and can be a number of HE-SIG-B 711 symbols. The MCS for HE-SIG-B can be two-bit and can be an MCS for HE-SIG-B 711. In some embodiments, the SU 802, 902 format can be 26 bits and the MU 804, 904 format can be 23 bits. An example of the number of bits that can be used for SU 802, 902 format fields and MU 804, 904 format fields has been described, but a different number of bits can be used.

In exemplary embodiments, tail bits may be used when some or all of the 6 tail bits are not included. The 6 bits can be used to signal one or more of LDPC or BCC encoding, and / or an STBC configuration. As indicated in 806, 906 in some embodiments, the 6 bits may be used to signal a free channel rating (CCA) rating / densification (3 bits) and / or length ambiguity.

Figures 10 and 11 illustrate tables 1000, 1100, respectively, of the HE-SIG-A format according to some embodiments. Figures 10 and 11 will be described together. In some embodiments, HE-SIG-A can have two formats, either a SU 1002, 1102 format or a MU 1004, 1104 format. In some embodiments, the HE-SIG-A 610, 710 format is signaled in the preamble. 605,705. Both the SU 1002, 1102 format and the MU 1004, 1104 format may include a bandwidth (BW), a BSS color, a CRC, and a tail. The BW may be two bits may indicate a bandwidth. The color of BSS may be six bits as shown in table 1000 or 4 bits as shown in table 1100 and may be an identifier of a BSS.

Two additional fields are illustrated in Figure 11, an indication of whether low intensity parity checking (LDPC) is used and an indication of whether space-time block coding (STBC) is used. In some embodiments, two bits may be used to indicate an STBC configuration. In some embodiments, the indication of whether LDPC is used also indicates whether binary convolution coding (BCC) is used.

The CRC can be four bits. The format of SU 1002, 1102 may include NSTS, MCS, encoding, Gl for data and beamforming. NSTS can be three bits and can indicate multiple spatial streams. The MCS may be four bits and may be an indication of the modulation and coding scheme (MCS) used to encode a remaining portion of the packet. The encoding may be one bit and may indicate whether the remaining portion of the packet is encoded or not. The Gl for data may be one bit and may be an indication of a guard interval for the remaining portion of the packet, for example the data. The formed beam, which may be one bit, may indicate whether or not the beam formation is used for the packet.

The MU 1004, 1104 format can include one NSYM for HE-SIG-B 711 and MCS for HE-SIG-B 711. NSYM can be three bits and can be a number of HE-SIG symbols. -B 711. The MCS for HE-SIG-B can be two bits and can be an MCS for HE-SIG-B 711.

The tail may be six bits and may be the bits for unwinding the convolution code. In exemplary embodiments, tail bits may be used when some or all 6 tail bits are not included. The 6 bits can be used to signal one or more of LDPC or BCC encoding, and / or an STBC configuration. As indicated in 1006, 1106 in some embodiments, the 6 bits may be used to signal a free channel rating (CCA) rating (3 bits) and / or length ambiguity.

Referring to Figures 8, 9, 10 and 11 and 808, 908, 1008, 1108, the MCS field may be used to signal one or more other fields. For example, signaling to MCS may only require a value for MCS from zero to ten. This can leave five extra values in an unused four-bit MCS field. These extra values or bits can be used to signal other fields. In exemplary embodiments, a portion of the MCS field may be used when some or all of the four MCS bits are used to signal one or more of LDPC or BCC and / or an STBC configuration.

In exemplary embodiments, if there are N values to use for signaling an MCS and STBC together, then the MCS specified to operate with STBC can be mapped to the MCS values. For example, if there are five values that can be flagged, then it is desired to use MCS 0 to MCS 4 to be used with STBC, then MCS 0 with STBC is flagged as MCS 11 in the HE-SIG MCS field. -A 610, 710. MCS 1 with STBC is signaled with MCS 12, etc. In exemplary embodiments, values are chosen to enhance performance, for example, instead of MCS 0 to 4, MCS 0, MCS 2, MCS 4, MCS 6, and MCS 10 values can be used, which can improve performance. using different bits.

In some embodiments, LDPC and MCS may be signaled together. In some embodiments, an STBC-reduced MCS field and / or an LDPC-reduced MCS field may be signaled together with the use of MCS values that are not used to signal MCS values. For example, the N MCS values can be used to signal STBC and 5 to N can be used to signal LDPC. In some embodiments, MCS values 11 through 15 may be used to signal MCS and / or LDPC together, and / or used to signal MCS and STBC together.

In some embodiments, signaling an inherited preamble configuration 605, 705 prior to HE signaling may carry the location of a HE-STF, the existence of a HE-SIG-B, and an interval length. for the HE-SIG-B, and / or a symbol size of HE-LTFs. Thus, settings can be used immediately after L-SIG, and signaled using L-SIG, so that the HEW 104 and / or master station 102 will know the settings after detecting L-SIG.

In some embodiments, the format of SU 802, 902, 1002, 1102 may be 26 bits and the format of MU 804, 904, 1004, 1104 may be 23 bits. An example of the number of bits that can be used for SU 802, 902, 1002, 1102 format fields and MU 804, 904, 1004, 1104 format has been described, but a different number of bits can be used. In addition, the SU 802, 902, 1002, 1102 format and the MU 804, 904, 1004, 1104 format may include fewer or more fields.

Figure 12 illustrates the HEW device in accordance with some embodiments. The HEW 1200 device may be a compatible HEW device which may be arranged to communicate with one or more other HEW devices, for example HEW STAs 104 (Figure 1) or master station 102 (Figure 1) as well as communicate with legacy devices 106 (Figure 1). HEW STAs 104 and legacy devices 106 may also be referred to as legacy HEW devices and STAs, respectively. The HEW 1200 device may be suitable to operate as a master station 102 (Figure 1) or a STA HEW 104 (Figure 1). According to the embodiments, the HEW 1200 device may include, but is not limited to, a transmit / receive element 1201 (e.g., an antenna), a transceiver 1202, a physical circuitry (PHY) 1204, and a circuitry of media access control (MAC) 1206. The PHY 1204 circuitry and the MAC 1206 circuitry can be HEW layer compliant and can also support one or more legacy IEEE 802.11 standards. The MAC circuitry 1206 may be arranged to configure packets, for example a physical layer convergence procedure protocol (PPDUs) data unit (PPDUs) and arranged to transmit and receive PPDUs, among others. The HEW 1200 device may also include a circuitry 1208 and a memory 1210 configured to perform the various operations described herein. Circuit assembly 1208 may be coupled to transceiver 1202, which may be coupled to transmit / receive elements 1201. Although Figure 12 depicts circuit assembly 1208 and transceiver 1202 as separate components, circuit assembly 1208 and transceiver 1202 can be integrated into one electronic package or chip.

In some embodiments, the MAC 1206 circuitry may be arranged to support a wireless medium during a containment period to receive medium control for the HEW control period and to configure a HEW PPDU. In some embodiments, the MAC 1206 circuitry may be arranged to support wireless media based on channel hold definitions, a transmit power level, and a CCA level.

The PHY 1204 circuitry may be arranged to transmit the HEW PPDU. The PHY 1204 circuitry may include a circuitry for modulation / demodulation, upconversion / downconversion, filtering, amplification, etc. In some embodiments, circuitry 1208 may include one or more processors. Circuit assembly 1208 may be configured to perform functions based on instructions that are stored in RAM or ROM, or based on a special purpose circuitry. Circuit assembly 1208 may be termed a processing circuit assembly in accordance with some embodiments. Circuit assembly 1208 may include a processor, for example, a general purpose processor or a special purpose processor. Circuit pack 1208 may implement one or more functions associated with transmit / receive elements 1201, transceiver 1202, circuit pack PHY 1204, MAC circuit pack 1206, and / or memory 1210.

In some embodiments, circuitry 1208 may be configured to perform one or more of the functions and / or methods described herein and / or in combination with Figures 1 to 12, for example, generate an L-SIG. to indicate an HE packet format or configuration or detect that an L-SIG indicates an HE packet format or configuration. Additionally, master station 102 and / or HEW device 104 may be configured to encode additional format or configuration information in the MCS field and / or using tail bits.

In some embodiments, the transmit / receive elements 1201 may be two or more antennas that may be coupled to the PHY 1204 circuitry and arranged to define and receive signals including transmission of HEW packets. Transceiver 1202 can transmit and receive data, for example, PPW HEW and packets that include an indication that the HEW 1200 device must adapt the channel containment settings to the settings included in the packet. Memory 1210 may store information for configuring the other circuitry for performing operations for configuring and transmitting HEW packets and performing various operations in order to perform one or more functions and / or methods described herein and / or in combination with. Figures 1 to 12 for example generate an L-SIG to indicate an HE packet format or configuration or detect that an L-SIG indicates an HE packet format or configuration. Additionally, master station 102 and / or HEW device 104 may be configured to encode additional format or configuration information in the MCS field and / or using tail bits.

In some embodiments, the HEW 1200 device may be configured to communicate with the use of OFDM communication signals by a multiport communication channel. In some embodiments, the HEW 1200 device may be configured to communicate in accordance with one or more specific communication standards, for example, Institute of Electrical and Electronics Engineers (IEEE) standards including IEEE standards. 802.11-2012, 802.11n-2009, 802.11ac-2013, 802.11ax, DensiFi and / or proposed specifications for WLANs or other standards as described in combination with Figure 1, although the scope of the invention is not limited to this aspect. , as they may also be suitable for transmitting and / or receiving communications in accordance with other techniques and standards. In some embodiments, the HEW 1200 device may use a 4x symbol duration of 802.11n or 802.11ac.

In some embodiments, a HEW 1200 device may be part of a portable wireless communication device, such as a personal digital assistant (PDA), a laptop computer, or a portable computer with wireless capability, a web tablet computer, a cordless phone, a smart phone, a wireless headset, a pager, an instant messaging device, a digital camera, an access point, a television, a medical device (for example, heart rate monitor, blood pressure monitor, etc.), an access point, a base station, a transmitter / receiver device for a wireless standard such as IEEE 802.11 or IEEE 802.16, or another type of communication device that may receive and / or transmit information wirelessly. In some embodiments, the mobile device may include, for example, one or more of a keyboard, a display, a nonvolatile memory port, multiple antennas, a graphics processor, an application processor, speakers, and other device elements. mobile. The display may be an LCD screen that includes a touch screen.

The transmit / receive element 1201 may comprise one or more directional or omnidirectional antennas, including, for example, dipole antennas, monopole antennas, patch antennas, loop antennas, microstrip antennas or other types of antennas suitable for transmitting data. RF signals. In some multi-input multiple output (MIMO) embodiments, antennas can be effectively separated to take advantage of spatial diversity and the different channel characteristics that may result.

Although the HEW 1200 device is illustrated as having several separate functional elements, one or more of the functional elements may be combined and may be deployed by combining software-configured elements, such as processing elements that include signal processors. (DSPs) and / or other hardware. For example, some elements may comprise one or more microprocessors, DSPs, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), radio frequency integrated circuits (RFICs), and combinations of various hardware and circuit sets. to perform at least the functions described in this document. In some embodiments, the functional elements may refer to one or more operating processes over one or more processing elements.

The following examples pertain to additional embodiments. Example 1 is an apparatus for a high efficiency wireless local area network (HEW) device (HEW), including circuitry configured to: generate an HE packet comprising an inherited signal field (L-SIG) followed by by one or more HE signal fields, wherein one or more HE signal fields comprise a HE-SIG-A field, and wherein a modulation and coding scheme (MCS) subfield of the HE-field SIG-A signals together an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices.

In example 2, the subject matter of example 1 may optionally include one or more other subfields that fall into the following group: a low density parity check (LDPC) and a space-time block coding (STBC).

In Example 3, the subject matter of Examples 1 and 2 may optionally include the circuitry that is additionally configured to: generate L-SIG to signal to one or more HEW devices either a first packet format of the HE packet. as a second packet format of the HE packet, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format.

In Example 4, the subject matter of Example 3 may additionally include the first packet format or the second HE packet format which is at least one of the following group: a single user format or a multiple user format ; and, an internal format or an external format.

In Example 5, the subject matter of Example 4 may optionally include the circuitry that must set an L-SIG length field to be one or two modules out of three (MOD 3) to indicate the first packet format or the second packet format.

In Example 6, the subject matter of Example 4 may optionally include the single user format and the multiple user format indicating at least a number of HE-SIG-B symbols.

In Example 7, the subject matter of Example 4 may optionally include the internal format and external format which indicate a guard interval for a HE-SIG-B and a HE long training field symbol (LTF) size. .

In example 8, the subject matter of any of Examples 1 to 7 may optionally include the circuitry which shall generate a duplicate L-SIG field with a polarity difference to indicate a third packet configuration of the HE packet. or a fourth HE package package configuration.

In example 9, the subject matter of Example 8 may optionally include the third package configuration or the fourth package configuration that fall into the following group: a single user configuration or a multiple user configuration; and an internal configuration or an external configuration.

In Example 10, the subject matter of any of Examples 1 to 9 may optionally include the circuitry which further comprises a processing circuitry and a transceiver circuitry.

In Example 11, the subject matter of Example 10 may optionally include the circuitry that is configured to operate in accordance with Orthogonal Frequency Division Multiple Access (OFDMA) and the Institute of Electrical and Electronic Engineers (IEEE). Electrical and Electronics Engineers) 802.11ax.

In example 12, the subject matter of example 10 may optionally include the circuitry that is additionally configured to transmit a drive frame to one or more HEW devices, the drive frame shall include a duration and frequency allocation for each of one or more HEW devices for a broadcast opportunity; and wherein the circuitry is configured to generate a second HE packet without the L-SIG field within the transmission opportunity.

In Example 13, the subject matter of any of Examples 1 to 12 may optionally include the HEW device which is one of the following group: an access point, a master station, and a HEW station.

In Example 14, the subject matter of any one of Examples 1 to 13 may optionally include one or more HE signal fields comprising at least one of the following group: a free channel evaluation margin / densification ( CCA) and length ambiguity.

In Example 15, the subject matter of any one of Examples 1 to 14 may optionally include a memory coupled to the circuitry; and one or more antennas coupled to the circuitry.

Example 16 is a method for signaling a packet configuration performed by a high efficiency wireless local area network (HEW) device (HEW). The method includes generating an HE packet comprising an inherited signal field (L-SIG) followed by one or more HE signal fields, wherein one or more HE signal fields comprise a HE-SIG-field. A, and wherein a modulation and coding scheme (MCS) subfield of the HE-SIG-A field together signals an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices.

In example 17, the subject matter of example 16 may optionally include one or more other subfields that fall into the following group: a low density parity check (LDPC) and a space-time block coding (STBC).

In example 18, the subject matter of Examples 16 and 17 may include generating L-SIG to signal to one or more HEW devices both a first HE packet format and a second HE packet format, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format.

Example 19 is a high efficiency station (HE) apparatus comprising a circuitry configured to: receive a packet from a second HE station, the packet having to include at least one field of inherited signal (L-SIG); determine if L-SIG indicates that the packet is an HE packet; defer based on information in L-SIG if L-SIG indicates that the package is not the HE package; and if L-SIG indicates that the packet is the HE packet, determine from a subfield among one or more HE signal fields a modulation and coding scheme (MCS) for a packet data portion and a check low density parity (LDPC) or spatiotemporal block (STBC) encoding from a subfield between one or more HE signal fields, wherein the HE packet comprises one or more signal fields.

In Example 20, the subject matter of Example 19 may optionally include one or more HE signal fields comprising a HE-SIG-A field and wherein the HE-SIG-A field comprises a subfield.

In Example 21, the subject matter of Examples 19 and 20 may optionally include the circuitry that is further configured to: determine whether the packet is a first packet format of HE packet or a second packet packet format of HE. HE, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format.

In Example 22, the subject matter of any one of Examples 19 to 21 may optionally include a memory coupled to the circuitry; and one or more antennas coupled to the circuitry.

Example 23 is a non-transient computer readable storage media that stores instructions for execution through one or more processors of a high efficiency wireless local area network (HEW) device (HEW), with operations must configure one or more processors to induce the HEW master station to: generate an HE packet comprising an inherited signal field (L-SIG) followed by one or more HE signal fields, where one or more HE signal fields comprise a HE-SIG-A field, and wherein a modulation and coding scheme (MCS) subfield of the HE-SIG-A together signals an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices.

In example 24, the subject matter of example 23 may optionally include one or more other subfields that fall into the following group: a low density parity check (LDPC) and a space-time block coding (STBC).

In Example 25, the subject matter of Examples 23 and 24 may optionally include instructions which are further configured to induce the HEW device to: generate the L-SIG to signal to one or more HEW devices either a first packet format of the HE packet as a second packet format of the HE packet, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format.

[0098] Summary is provided to comply with Section 37 C.F.R. 1.72 (b), which requires a summary that will allow the reader to quickly verify the nature and main idea of the technical revelation. It is understood that it will not be used to limit or interpret the scope or meaning of the claims. The following claims are incorporated herein into the detailed description, wherein each claim is sustained as a separate embodiment.

Claims (25)

1. A high-efficiency wireless local area network (HEW) device (HEW) characterized in that it comprises a circuitry configured to: generate an HE packet comprising an inherited signal field (L-SIG) followed by one or more HE signal fields, wherein one or more HE signal fields comprise a HE-SIG-A field, and wherein a modulation and coding scheme (MCS) subfield of the HE field -SIG-A signals together an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices. HEW device according to claim 1, characterized in that the one or more other subfields are from the following group: a low density parity check (LDPC) and a space-time block coding (STBC) ). HEW device according to claim 1, characterized in that the circuitry is further configured to: generate the L-SIG to signal to one or more HEW devices both a first packet format of the HE as a second packet format of the HE packet, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format. HEW device apparatus according to claim 3, characterized in that the first packet format or the second packet format of the HEW pack is at least one of the following group: a single user format or a multiple user format; and, an internal format or an external format. HEW device according to claim 4, characterized in that the circuitry must configure an L-SIG length field to be one or two modules out of three (MOD 3) in order to indicate the first packet format or the second packet format. HEW device according to Claim 4, characterized in that the single-user format and the multi-user format indicate at least a number of HE-SIG-B symbols. HEW device according to claim 4, characterized in that the internal and external formats indicate a guard interval for a HE-SIG-B and a long training field symbol size (LTF). ) from HE. HEW device according to any one of claims 1 to 7, characterized in that the circuitry must generate a duplicate L-SIG field with a polarity difference to indicate a third packet configuration of the packet. HE packet or a fourth packet configuration of the HE packet. HEW device according to claim 8, characterized in that the third packet configuration or the fourth packet configuration is one of the following group: a single user configuration or a multiple user configuration; and an internal configuration or an external configuration. HEW device according to any one of claims 1 to 7, characterized in that the circuitry further comprises a processing circuitry and a transceiver circuitry. HEW device according to Claim 10, characterized in that the circuitry is configured to operate in accordance with Orthogonal Frequency Division Multiple Access (OFDMA) and the Institute of Electrical and Electronic Engineers ( IEEE - Institute of Electronic and Electrical Engineers) 802.11ax. HEW device according to claim 10, characterized in that the circuitry is additionally configured to transmit a drive frame to one or more HEW devices, the drive frame having to include a duration allocation. and frequency for each of one or more HEW devices for a broadcast opportunity; and wherein the circuitry is configured to generate a second HE packet without the L-SIG field within the transmission opportunity. HEW device according to any one of claims 1 to 7, characterized in that the HEW device is one of the following group: an access point, a master station and a HEW station. HEW device according to any one of claims 1 to 7, characterized in that the one or more HE signal fields comprise at least one of the following group: a free channel rating margin / densification (CCA) and length ambiguity. HEW device according to any one of claims 1 to 7, characterized in that it further comprises a memory coupled to the circuitry; and one or more antennas coupled to the circuitry. A method for signaling a packet configuration performed by a high efficiency wireless local area network (HEW) device (HEW), the method comprising: generating a HE packet comprising an inherited signal field (L-SIG) followed by one or more HE signal fields, wherein one or more HE signal fields comprise a HE-SIG-A field, and wherein a subfield of HE-SIG-A field modulation and coding (MCS) together signals an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices. Method according to claim 16, characterized in that the one or more other subfields are from the following group: a low density parity check (LDPC) and a space-time block coding (STBC). A method according to claim 16 or 17, further comprising: generating L-SIG to signal to one or more HEW devices either a first HE packet format or a second packet format. HE packet, where an L-SIG 3 module length is used to signal the first packet format or the second packet format. Apparatus of a high efficiency station (HE) characterized in that it comprises a circuitry configured to: receive a packet from a second HE station, the packet having to include at least one inherited signal field. (L-SIG); determine if L-SIG indicates that the packet is an HE packet; defer based on information in the L-SIG if L-SIG indicates that the package is not a HE package; and if L-SIG indicates that the packet is the HE packet, determine from a subfield of one or more HE signal fields a modulation and coding (MCS) scheme for a packet data portion and a check low density parity (LDPC) or spatiotemporal block (STBC) coding from a subfield between one or more HE signal fields, wherein the HE packet comprises one or more signal fields. HE station apparatus according to claim 19, characterized in that the one or more HE signal fields comprise a HE-SIG-A field and wherein the HE-SIG-A field comprises The one subfield. HE station apparatus according to claim 19, characterized in that the circuitry is further configured to: determine whether the packet is a first packet format of the HE packet or a second packet format of the packet. HE packet, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format. HE station apparatus according to any one of claims 19 to 21, characterized in that it further comprises a memory coupled to the circuitry; and one or more antennas coupled to the circuitry. 23. Non-transient computer readable storage media characterized by the fact that it stores instructions for execution through one or more processors of a high-efficiency wireless local area network (HEW) device (HEW), where operations To configure one or more processors to induce the HEW master station to: generate an HE packet comprising an inherited signal field (L-SIG) followed by one or more HE signal fields, where one or more HE signal fields comprise a HE-SIG-A field, and wherein a modulation and coding scheme (MCS) subfield of the HE-SIG-A field together signals an MCS and one or more other subfields; and transmitting the HE packet to one or more HEW devices. Non-transient computer readable storage media according to claim 23, characterized in that the one or more other subfields are from the following group: a low density parity check (LDPC) and a space block coding -temporal (STBC). Non-transient computer readable storage media according to claim 23 or 24, characterized in that the instructions are further configured to induce the HEW device to: generate the L-SIG to signal to one or more HEW devices. either a first HE packet format or a second HE packet format, wherein an L-SIG 3 module length is used to signal the first packet format or the second packet format.